For what it claims as anti-frizz, yes it does it, that's why I bought it. It doesn't moisturize, it doesn't give body to the hair like the salon treatment, and I don't know about straightening because my hair has already lost its shape and straightened on its own, I see the same result after using the product. The result lasted for quite a while, maybe 3-4 weeks, and I used half a bottle with long hair. What disappoints me is the difficulty in drying... It's a tiring process. I don't know if I would buy it again, but for someone who wants to relieve a bit of frizz, it's okay for their money.

It does a good job, worth it (I say it after 15 days), but: First of all, you have to carefully follow the instructions. They are not in Greek. Definitely have a thick comb to remove the excess cream from the hair, as afterwards it will take a lot of effort to dry the hair. During drying, ALL windows should be open, it smells and smoke comes out - not annoying as a smell (toxicity?? I hope not!). It takes a lot of time and patience because each section needs multiple passes to dry. If you have someone to help at this stage, maybe the result will be better.
It is written in bold in the instructions that the hair must dry well with the blow dryer. The box has a chart showing how curly the hair is and what can be achieved, I attach it. It lightens the color and it says so, so dye your hair afterwards. Also, cut your hair beforehand if it's time to do it so that the box is enough for two times. For short hair, it is enough for two times. I could already tell the difference from washing! It does the job.