I skipped the lower strength options and went right to the Crystal Retinal 24...

I skipped the lower strength options and went right to the Crystal Retinal 24 because my skin is fairly accustomed to retinoids. I've been using it for a month and I've experienced no redness or irritation whatsoever. I also haven't had any noticeable improvement in fine lines or texture. I understand that 4 weeks isn't long enough to see super obvious improvement, but I assumed there would've been at least a tiny change by now. I'll keep using it for a couple more months and see if anything happens.