Does anyone here use Arc Fault circuit breakers?

I am going to be replacing a sub-panel box and wanted to use arc fault circuit breakers, but from the reviews on home depot and loews I am concerned about their reliability. More than one person has complained that they only last around two years and then they go bad, and at over 40 bucks a pop (I'll need 8 which would be 320.00). That's a bit too costly if I have to replace them every couple of years.

Anyone else seeing short life time on these circuit breakers?