It was amazing!!! I got it done in early December (got the Global Keratin, which is a lighter treatment without the strong formaldehyde chemicals) and my hair has looked like perfection for the last 2 months. It is starting to wash out a bit now (they say 2-3 months, mine I think is right in that range). I work out a lot though and the lady told me that the salt in sweat can make it come out more. But it is sooo smooth and not frizzy at all. And it is super easy to manage and dry. I literally no longer use any product in my hair after shampooing! Amazing. I look like I stepped out of a salon every day when I wake up! ROFL. Cannot recommend it enough.
I didn't end up going to Ulta though. I went to a specialty salon that only does Keratin because they had like 10 different options of different strengths of treatment. We did a 20 min consultation first and the lady recommended the GK treatment over a stronger one for my hair type, and I think that was perfect. It allowed me to keep my volume too, so my hair was not too flat. It was $150. So worth it!
Anyway, I have my hair highlights scheduled for tomorrow and then another GK next week. By the way, the treatment seals in the color of any highlights so so well! I am just so happy I discovered this. Apparently this treatment will "build upon" the prior one so they told me it should last about 4 months this time. Fine by me. If it doesn't, I may get a stronger version next time that lasts 6 months, just so I don't have to keep going back. But frankly this has changed my life!