Could've been a great case.
Pros: very light weight; rigid outer foam seems like it would provide plenty of protection.
Cons: interior is not "plush" as described here, or "padded" as described on SKB's site - it is more like a styrofoam cooler covered with a thin black cloth. Any bump or shock to the exterior of this case would transmit right through to the keyboard inside. Due to the interior stiffness, measurement is critical. Other sellers and even the factory box the case comes in list depth as 3.5", but I believe 3.25" is closer to correct. Will not fit a Venom.
If this case had a decently padded interior and tie down straps, I'd give it an extra star and recommend it. Throw on a heavier duty zipper and some exterior reinforcement - it might get close to five. As is, I wouldn't use it for a keyboard.