I've had my PS3 for around a year now, and I have had my two six-axis with it since the beginning.
They both are still working okay, except one of them has a clicking left analogue (rotating it 180 degrees or more and it starts making a clicking sound as it's turning, but it doesn't effect gameplay). I know it's not right because I've never encountered a PS controller that's done it (and I've had at least 7 over the last 3 generations) AND it doesn't happen each and every time I turn the analogue.
One thing that's universally bad I've noticed is that the triggers tend to feel spongey, they don't have the same snap back like the RT and LT on the 360 do. Also, the lack of real estate under the controller (they did just take a DS2, minus the rumble and cable and shaved the bottom to include triggers) makes it hard to play for longer than an hour without straining my hands.
But otherwise they're both fine and I don't really mind the lack of rumble. They don't feel as sturdy as the 360 controllers or the DS3, but they work fine and I'm not forking out $99AUD for a more heavy controller.
Also, I've notice the rise in PS3 fanboyism in VGChartz. The guys expressing an opinion, and his own experience. From my own experience, I do agree with him. The Six-axis (in my view) is the worst (official) playstation controller ever and I've owned them all (including the analogue free PS1 controller). It's easily the worst this generation, fair inferior to the 360 controller AND the Dual Shock 3.
So give the guy a break, congratulations that you're controllers haven't broken, but that doesn't mean that it doesn't happen. Do you want a medal? Seriously, what are you trying to accomplish?
It's not like a person is going to go onto the internet and decide to not buy a PS3 just because some random they don't know had a technical issue. It's people like Mirson that get you the DS3. Sony recognised an issues with six-axis and they addressed it. DS3 may have dual shock and be more heavy, but it's also alot more sturdy and the triggers actually have feel to them.