I have been using this for a month. It is formaldehyde free and smell free, which is important for me. My hair is straight and shiny. The kit fits my budget and daily routine. Comfortable on scalp. Recommended for women and men.

Superb cysteine treatment. No formaldehyde smell. Hair becomes salon smooth. 900 ml Sx4 is value for money. Daily use gives good results.

Works well for straightening but takes a long time. The smell is zero and hair feels nice. I use it weekly. Gave 4 stars because the quantity is large but the process is tedious. Still, no damage and comfortable.

Very good product. Smell free and formaldehyde free. My hair is smooth and straight now. Comfortable to use daily. Worth the money.

Bought this for my husband and myself. We both have different hair types but this worked well. No smell at all, which is great for daily use. Hair feels soft and straight. The kit is easy to use at home. Only thing is you need patience. Otherwise a solid product.

As a salon owner, I have tried many hair straightening products. This Cysteine and amino acid treatment is one of the best because it is formaldehyde free and smell free. Clients love that there is no irritation. The 900 ml Sx4 pack gives good value. Hair remains straight for weeks and feels comfortable. The product fits well in our daily salon routine. Highly recommended for both men and women.

I was skeptical about doing this at home but the instructions were clear. The kit has four bottles and mixing is easy. My hair feels smooth and straight without any chemical smell. I use it once a week for daily smoothness. Comfort level is good, no burning.

Best cysteine treatment I have used. No formaldehyde, no smell. Hair becomes straight and soft. 900 ml is enough for many sittings. Fitting price for salon quality.

Excellent professional kit. The 900 ml pack is value for money and enough for long hair. I noticed less breakage and smoothness after two uses. The seller packed it carefully.

Nice hair treatment. My hair feels soft, shiny, and easy to style. It did not dry out my scalp like other straightening products.

This is my second purchase. Last time I used it before my cousin's wedding and everyone asked what I did to my hair. The smell is almost nothing, which is a big relief. It does not make hair flat or greasy. I use a small amount each time, so one bottle lasts long. If you have dry, frizzy hair, you should try it once.

I used this treatment on my wife's recommendation. It tamed my frizz and gave a neat straight look. The best part is zero chemical fumes. Delivery was on time.

I ordered this after reading that cysteine is safer than other straightening systems. The kit arrived well packed and sealed. I did the treatment with my friend's help. My hair is now smooth, shiny, and much less tangled. The effect has lasted about a month so far. It is not a miracle for very damaged hair, but for the price and quantity, it is a solid buy. I recommend it to anyone tired of expensive salon visits.

Product is genuine and works well. The instructions could be clearer, but the result is smooth salon-like hair. Packaging was sturdy.

Bought the Sx4 pack for family use. My mother and I both used it. The mixing ratio matters, so follow the manual carefully. Hair became smoother and easier to comb, especially at the ends where it was damaged. It is formaldehyde free, so no burning sensation on scalp. I have already told my cousin to order this. Good product for the price.

Bought the Sx4 mono kit for my salon. Clients are happy because there is no formaldehyde and the smell is very mild. Results are consistent and the hair stays smooth for weeks.

Ordered this for personal use after my salon recommended it. The smell is almost nil and it does not damage hair. I have wavy hair and got straight, smooth results at home. It takes some time but the finish is professional. Comfortable on the scalp, no itching. Good for daily styling too.

Used this on my wife's suggestion. Application process is a bit lengthy, so keep two hours free. Result was good: hair became straight and manageable, not poker straight but natural smooth. One star less because the instructions could be clearer for beginners. No strong smell, which I liked. Overall worth trying if you want salon-like finish at home.

As a man with curly rough hair, I was skeptical. This amino acid treatment made my hair straight without making it flat. No burning or bad odour. Worth the price.

Good for damaged hair. I used it after coloring and my strands feel stronger. The 900 ml kit will last long for my family.

I have rough, curly hair and had almost given up on straightening treatments because they damage my hair. This amino acid and cysteine kit is much gentler. After three washes, my hair still feels soft and there is no weird chemical odour. My sister recommended it and now I understand why. The 900 ml pack is huge and will last many months. Value for money is excellent compared to parlour charges.

The product quality is salon grade. I liked that it is formaldehyde free and almost odourless. My hair has less frizz and looks smoother even after a month. Packaging was sealed properly.

I was sceptical about doing cysteine treatment at home, but this kit surprised me. The solution did not smell harsh at all, unlike earlier treatments I tried. My hair felt smoother after the first use and the frizz reduced a lot. It took some time to section and apply, but the finish looked close to what I get at the salon. For 900 ml x4, the price works out reasonable if you split with a friend or use it for multiple sittings. I will definitely buy it again when this gets over.

Used this on my sister's advice. No strong chemical smell, easy to mix, and hair became straight and manageable. One star less only because delivery took two extra days.

I have been using this Cysteine treatment in my salon for a few months now. It is completely formaldehyde free and has no harsh smell, which is a big relief for my clients. The 900 ml Sx4 kit lasts long and the results are salon smooth straight hair. My clients often say their hair feels comfortable and manageable for daily use. Definitely worth the price.

I have thick frizzy hair and have spent a lot on salon treatments. This cysteine kit gave similar smoothing results at home without the harsh chemical odour. The 900 ml pack is enough for multiple uses and my hair felt softer after the first wash. Delivery was also quick.