I have the Filzer crank puller from MEC. I probably use the tool about 10 times per year and, at that rate, I think it will last longer than I do. If it doesn't last a LONG time, I'm sure MEC will replace it.
I actually have 50+ Filzer tools and they seem decent. I hated the cable cutters in the beginning but have lately improved my technique and don't hate them so much (would still try other brand if replacing). I bent one of the allen keys under extreme torque with a two foot cheater bar.
No other problems.