I used to use the Young Nails ones, but sometimes they stick just a little too well and it's almost like I'm waxing my client's fingertips when I go to peel it off. CND ones are ok but sometimes they pop apart on me. Nail Harmony one is good, too, but I find they're unnecessarily long. The average woman is not going to get her nails 3-4cms from the tip. I've been using the Crystal nails ones these last couple of months. Don't really have much to say about it other than how time consuming it can be to tailor a form. But they've been working for me alright at the moment.