Eh...it's not that bad. Just make sure the mask is certified for higher than you're going, you've got plenty of O2 and don't wait until you get above 12,500 to put it on. Get it on early.25,000MSL in a non-pressurized would be lovely.
RD
Yeah, the O2 is drying, so that sucks...but it isn't too uncomfortable up high. Now, no ice protection at FL250 would suck.
As far as ALL PILOTS who leave their strobes ON at night is just plain dumb!
This here is the problem folks. It isn't the plane, it isn't the checklist. It's the idiots in the front of it that can't figure out they should leave that switch off until they take the runway. You can't fix stupid.
-mini