So basically this case comes in two pieces that connect to each other. I've had this case for just about a month now, which isn't that long but thus far I've been pretty satisfied with it. It is a conversation sparker at parties, or wherever you go really. People look at it and give you either a judgmental glare or a nod of solid approval.
After having this product for about a month, I noticed that some auxiliary cables or headphone jacks don't fit perfectly into it. The jack has to be thin and narrow, so if you use a fat cable you won't be able to properly connect to your iPhone. I solved this problem by simply removing the case (I usually plug in an auxiliary in the car, so it's no big deal). At first glance, I thought it was near impossible to remove the case. However, if you keep a firm grasp on the phone, and dig your nails into the bottom part of the case and pull, it should slide out relatively easily. I've never had a scenario where the case has separated by itself. I've also dropped my phone a few times, no biggie. You'll start to notice some wear around the case but that's expected if you drop your case often.
As for how the case works as a bottle opener, it's pretty solid. Get a good grip on both, and just yank it open. Try to keep your phone clean afterwards tho, I sometimes tend to get beer on the back of my phone after I open it. Overall, this product is pretty decent. For the novelty can opener in the back, and the solid protection it offers, $18.95 AND prime shipping was not too bad of a price for me.