I think what comes down to is, I've never seen a real impressive clear bra. the only good one I saw was on a Ford GT, it was really good, but god knows how much the owner paid. I'm always open to new things but, for me the real turn offs for a clear bra are in no particular order are:
High Cost
Difficult to install
Must have no rock chips present before the install or you will get bubbles
What do you do when you wax the rest of your car, how will the area look
Any kind of nicks through the bra itself will look even worse then a chip itself
Freshly painted surface always makes me happy
Please tell me if these are just misconceptions
I might have stretched it about the $325 respray, but I know people who have done it. Got a friend with an M3 and he got his hood resprayed for about $325, and it looks great!