Very well built case, adds a fair bit of weight, but feels very strong.
fits the Sub37 perfectly, no movement of the synth inside the case when closed.
One very minor drawback, when lifting the synth out of the case, the lid is heavier than the base, so the case will tilt backwards, but when you know it's going to happen you can brace it against a wall or with your leg so it's not a major issue at all.
Would very much recommend this case to anyone who's planning to move their Sub37 around, it's built like a tank.