Stoney,
I've had a 14.4 Firestorm set for at least 6 years. I've tried really hard to tear them up, but can't. You will wear out batteries and they're damned expensive, but the tools will hold up just fine.

Save the money.

I know DeWalt and some of the other brands are perceived to be "better," but I can't argue with what works.

87 Montero, bought new, by me -
88/89 intercooled Starion Turbo engine-
with awesome audio.