I'll just throw this out there for what it's worth as well (and probably not much, it's second hand as I don't work there):

I had a GoJet guy in the jumpseat last week who mentioned the upgrade pass rate there is a little over 50%, aka, abysmal. If there's a place to go with quality training where you can become adequately prepared to upgrade at 1001 SIC, I wouldn't bet my career on it being Gojet.