..and never had a problem. I bought a really tough bag to pack my gear in and it's well padded. I leave the computer off and there is no problem with altitude. I've always flown to my destinations with no connecting flights. Connecting flights might increase the odds that you'll get there and your gear won't. Can't really lock anything anymore as they might cut off the lock. I use zip ties and that always makes me a little nervous, but then if the baggage guy wants my stuff, a little lock won't keep him out. I need to get new a good reg bag so I can start carrying on my regs. The more you can carry on the better, I guess.