yeah it is. he says they are the way to fly, as your stub shaft is really short and your hub won't be sticking past the end of your wheel. It makes sense to me, and i would totally go that route when I build my front 60, but i don't know if it will be worth it...i'll have to see.
everyone says that unit bearings are bad news and prone to fail, but i don't know that i agree with that. for one, they were engineered for the front of a 1 ton truck that has a HEAVY diesel engine sitting on it. what is a Jeep compared to that? Plus, that is what spidertrax builds their axles with, and i have seen some pretty crazy video of rigs with their axles jumping big time...i don't know. mitch (venture13) can tell you all this and more though.