I bought this case to transport my Focusrite audio interface and Octopre extension, and I have to say the Gator GR-4S works perfectly for this setup.
Lightweight: First of all, the case itself is very light. When you are moving your studio gear around, keeping the total weight down makes a big difference.
Handy & Compact: The "S" version is a great choice for rack gear that isn't very deep, like audio interfaces. It isn't bulky, fits easily into a car trunk, and the handles are comfortable and solid.
Durability: Despite its low weight, the construction is quite rigid and durable. The material easily handles transport, bumps, and regular use on the road. The latches hold tightly, and the lids fit well.
Summary: If you are looking for a compact, lightweight rack that reliably protects your gear without adding extra weight, the Gator GR-4S is a great choice. Very good value for money. Highly recommended!