I bought stealth guards for my EVO. I was disappointed that they suggested you wet the guards before you apply them. I'd heard too many horror stories about water <> EVO. So I applied mine without water and they stuck just fine. I like the one applied to the back, it was easy and went on the first time I tried it. However, I'm glad they sent 3 skins because my first two attempts at applying them to the front failed. Too many bubbles, etc. I suppose using water might help make it easier to remove bubbles, or avoid them in the first place. But on the third skin I got it right (or close enough) and I'm content with it. It's not nearly as clear and invisible as I'd like, but it feels OK under my finger, and it's clear enough for now. I can tell I'll have to replace it in 6 months or so, perhaps a year....it has a few knicks where I've been too rough with it. But the knicks are in the skin, not in the phone, so they're doing their job.
Would I buy them again, or recommend them? No, not really. They're inexpensive, which is good, but they're a bit hard to apply, and the water thing really throws me.