I use a Hiscox, but so far as yet have not had to put my guitar into the hold except on the way back from Ireland.(But then I kicked up such as fuss, it was hand loaded and unloaded in my presence) usually I tell them I'll take it to the aircraft, get it into the fragile hold.(Pressurised and heated) but then I just walk up the stairs or down the tube and into the cabin, tell them it fits, the lockers and that it always goes in there, the stewardesses usually shrug and let me put it in, but then I am charming by nature and always polite, but firm, never rattled or cross.Never let it get loaded and unloaded by the staff-did it the first time I flew to Spain, all I got was a broken case full of matchwood!