I'd recommend these only for everyday use, not for anything rugged or someone with a heavy hand for the following reasons:
1. The workmanship around the zippers is fairly poor. Strands started to unravel the minute it arrived and has continued to unravel. That said, it's still in good shape and holds together.
2. The wheels are very smooth and durable; I've taken mine to the outback, dirt and gravel, and it still has a lot of life left it in.
3. The hardcover casing is thin but as long as you don't plan on abusing it, it should be fine. The thinness lends to the cases being very light weight.