I've used them, too, and even traveled to Europe for some gigs with them. They held up extremely well. The leather is thick and protective. If I have a niggle, it's that I prefer closed cell foam to the softer stuff Levy's uses. But that wouldn't stop me from getting one.I have a couple of Levy's leather gig bags. I got them for a ridiculously low price at a Guitar Center sale...
One is glove leather soft, like it was used for years and the other a bit more stiff, but they both work great at protecting my guitars.
I've even taken my PS HB II out in them...