Decent for the money for hauling gear, prefer the otter for towing at any speed. Otter seems to have a thicker bottom and can get hifax. Couldnt get them for the shappell, but this was a few years back.
For just a sled, I'd go with an otter. Much more durable and the accessories, ie. tow bar, hifax, and covers I think will make your purchase more enjoyable and useful IMO.