I've had a resistive screen failed once (not N900). It registered the touch about 2 cm to the left of the actual point. Annoying on the "enter SIM card PIN" screen: the PIN could be entered with the HW keyboard but after that you had to tap "OK" on the screen. The "Emergency call" button was 2 cm to the left

That device was 6 or 7 years old at the time. I replaced the screen and used it for 2 more years until replaced with the N900. It still works fine but I don't use it any more.