I've had my Steam controller for about 1 year and at the 6 month mark the left flipper broke. Since it is all configurable I just made left flipper now left grip.

Then a month ago the battery compartment cover / left and right grip, had one of the two plastic prongs break off so of course I got out the duct tape xD

It's electronically sound so far but the molded plastic is giving out !!

The left joystick takes a lot of abuse and is holding up fine so far.

I'll comment again should anything else fail.

Oh I didn't mention that it is used daily for 8 plus hours.