The Pugsley is exactly two years old this week and until last month I have not had a single problem with it. I have been running the same chain, brake pads and tyres and I haven't even had a flat tyre yet!
I say "until last month" because I've been tearing out my hair getting my formally bulletproof braking system back on track. First my front pads lose all power with still plenty of wear left on them. I've been told it was probably oil contamination but I'm not entirely convinced. I pay $40 (rip-off) for some Kool-Stop replacements to watch my front fork resonate and shudder back and forth even under moderate braking and then last week when I'm riding under-water trails out in the forest my back brake goes all spongy at the lever and loses all power.
I finally get some XTR after lusting after it since 1993 and it turns out to be EXACTLY the same part as bottom-of-the-range Deore right down to the code number stamped on the back!
Well I spent another $40 (rip-off), on another set of pads (Shimano XTR resin this time) and put those on the front wheel. A HUGE improvement. Almost as much power, less noise, nice modulation and I don't have to watch the fork bouncing back and forth by half an inch as I slow down.
I took out the original rear pads and they had worn down completely to the metal holder. I am lucky I don't use much rear brake or I would have totaled my rear rotor. The lever had so much travel as one of the pistons had pushed right out and become stuck. I was pleased it wasn't a hydraulic issue as I don't know how to bleed them yet and I hate taking my bike into the shop to get work done on it.