I probably have a different use for these than most people. I don't use them for audio equipment, I put amateur radio equipment inside and they work well for that. They cost a lot less than a Gator case and I suppose there may be a quality difference but the 6U case I bought works really well and is really sturdy. If you want to build a ham radio go-box this case will save you some money.
I can't speak about how they would work for audio equipment and 'on the road' type use.