I ordered my SGP Incredible Shield from sgpstore.com earlier in the week. I put it on yesterday, and I've been using my iPhone all day today with it on. I HIGHLY recommend this shield over the Bodyguardz. I haven't tried the Invisible Shield, but I'd imagine this blows that away too. 1. EASY to install. I am more concerned with the back piece, since I use a powersupport anti-glare on the front. The corners go on easily, and they leave only a sliver of space uncovered. They are cut so well, so there is no piece that sticks up or anything like that. The bezel is covered by 4 individual little strips that go on, independently of the backpiece. Looked difficult at first, but installation was a snap. I've put on bodyguardz before, and the process made me want to kill myself. This was EASY, in comparison. Took 10-15 minutes. 2. Protection: I had the bodyguardz before, and even the included squeegee would scratch that thing. SGP advertises that their shield is 30% thinner than the others, without compromising protection. So far, it seems they are not wrong. I tried scratching with keys - still looks perfect. 3. Price - $25 for two sets (but only comes with one bezel strip set - weird). This is pretty on par with the others (except the BSE, which I haven't tried). Comes with the squeegee, spray solution, a lint-free cloth, 2 backpeices and one front-piece. I didn't put the front piece on, but it looks like similar to the powersupport crystal films - and doesn't require any liquid to apply it. Hope this helps someone!