I've been using this case for a couple of years now, and it's still as sturdy and durable as it was in the beginning.
The only downside is, if you leave the bottom of the case under the amp, then you can't use straight plugs for your cables. So I've had a 90 degree plug made for my speaker cable. Of course you can just take the bottom out from under your amp, so it's just a bit of a convenience thing.
All in all I am very pleased with this case, very glad I made the purchase, and would buy other Thon cases in a heartbeat.