I had a full-body InvisibleSHIELD on my BB 8830. I found that the "seams" where the pieces met were uncomfortable when I held my BB---I was very aware that there was a seam. I removed the side-rail protectors within a few days because no matter how much I adjusted them, there always was a hard crease at the top or the bottom of the side-rail protector where the shape of the rail rounded out. Finally, I found that dust/lint tended to catch at the seams; not a lot, but enough to bother me.

I purchased three InvisibleSHIELDs for my phone because I blamed the problems on my application of the protector. After the third failure, I decided that my application wasn't totally at fault. I just didn't like the way the InvisibleSHIELD fit my BB, the "fit" was very slightly off for certain areas of the housing and I wasn't happy with it.

Theoretically, I love the idea of the InvisibleSHIELD, but in practice it wasn't quite as "invisible" as I had hoped.

I hope this helps.