Wow, this is good news... Options!
Yes, the stock alternator in ANY vehicle sucks. It's meant to cover basically any installed option, perhaps all on at once - and that's about it.
Add lights, a sound system, a winch - and you could start to push the limits. A good idea for heavy use might be a yellow top Optima battery and this alternator sounds cool...
I wanted to get one for the Bug at one point, which has 11 speakers and over 400w going through it - including the 15" subwoofer.

It sucks that you have to send them a core, because no matter how you slice it, you're gonna end up with an extra alternator or no truck for a week. Blah.
Another alarming thing is the position of the alternator to begin with... If you offroad, this can be an expensive mistake.
------------------
01 SE 6cyl 5spd Solar Yellow