i have a full body zagg on mine while waiting for otterbox to put out their cases. the 4 back corners all start peeling eventually. they did on my curve and are doing it on my inc. aside from the peeling, i really like them. the screen protector does not have any corners coming off or being pulled up. as far as the orange peel look to them, it doesn't really bother me any. besides, you have to be looking at screen from an angle to notice it.
as far as which is best, all a matter of personal opinion.
never had to call them so couldn't comment on customer service either.