I gotta say, this has been an interesting (and long) thread. Since I made it this far, I'm gonna throw in my two cents.
Since I'm relatively new to the game, I've only ridden my current setup: '08 Burton Air/Customs/Salomon Dialogues this season, and some random borrowed crap last season. I've had two problems with my Customs:
1) I cracked the plastic washer piece that bolts the highback to the chassis by putting pressure downwards on the top of the highback I think when I was leaning on it to get up. That was surprising 'cuz it really wasn't that much pressure. I'd have to chalk that up to poor design.
2) The holes in the baseplate that the screws go through have worn to the point that they are no longer circles but like, oblong ovals. I suppose because I used to never tighten my screws until I felt my bindings get loose, so maybe that's from the binding moving around. I learned my lesson from that: check screws before every session.
So if you ask me, I'd say the Customs are fine for a beginning rider or pure park stunting, but if you like to ride real hard then you'll wear the shit out of them. Not only that, but they're sketchy as hell on blacks, deep powder steeps, and pretty much anything that is gonna put undue stress on them. But then again what do you expect from a low-end freestyle binding.
I don't think people should hate on Burtons just 'cuz it's Burton/Nike/Starbucks/Walmart/whatever but take it on a case-by-case basis. Customs + hardcore freeriding = replacement parts. Get the best bindings specialized for what you're using it for and you'll probably be okay.
BTW, I've got a set of Ride RXs on the way -- can anybody tell me what they think about these? I was considering getting Cartels although they're a bit pricier, but wanted to try something other than Big Bad Burtons.