I bought this to house diy NLC modules, which are mercifully low on their power requirements. It’s worth noting that this has the lowest power rating / hp of all Doepfer monsters (go one up and you get two psus for four rows, go one down and you get one psu for two rows). It’s utterly fine for low current modules, but do plan it out if going more mainstream.
I also bought this to go on top of a 12u monster. It works, it is stable, but it’s also worth noting that the connecting hinges needed to be drilled out to connect the cases together. They are not a clean fit.
The case itself is great! Deep, spacious, sensible rails. I don’t need the portability, but some of the additional costs over eg an ADDAC whopper is in the flight case design. It’s great as a flat against the wall case, and totally does it’s job.
Not deep enough to hold a spring reverb tank flat / horizontal. Pretty much the only fitting challenge I’ve hit!