Fits a Line6 POD HD500X plus extra expression pedal with room to spare. The bottom part is perfectly sized to allow free access to the jack on the back of the Pod, and the footswitches on the main body. There is some space along the sides, but a judicious application of foam padding will take care of that (I used the foam from a gun case), with the added benefit of extra cushioning for the unit.The construction doesn't feel too rugged, but is rugged enough. The workmanship of the case is adequate, nothing mindblowing.All in all, it is a very good gigging road case for the Pod, and seems well-enough made to last a few years of transport in the back of a car, though I probably wouldn't subject it to the vagaries of travelling as checked baggage on a flight.