I have a Gill one which I’ve had for years, and works OK, but you do need to be a bit careful when packing the bike. I use mine most weekends with either a road, mountain or TT bike flying to different races in India, never had a problem yet.
I have however just ordered the EVOC bag, looks superb feature-wise and lots of nice things like supporting the chainstays so that the chainrings aren’t sitting on the bottom of the bag.
Ultimately it won’t give as much protection as a hard case, but a lot of those are very heavy, so will eat into baggage allowance.
I also wanted something which could work with road, MTB Q/R, 15mm, 20mm, 12mm etc wheels, so the road specific hard case which looked superb wasn’t going to be great for holding a lot of my knobbly wheels.
Cheers, Rich