Got myself the Tessaract Vault kit and I absolutely love it!
The quality is top notch, everything fits together perfectly, the Transcendent C'tan looks awesome and to top it all off the kit comes with 40 (!) scarab models in addition to those that are already cast as part of the walls of the Vault (which look like more than enough by themselves already). I could make 10 scarab bases off of those things!
The edges connecting the wall sections are incredibly well cast and interlock perfectly across a crooked line that's over 20cm long along 4 different planes. I think it could be assembled so that all 4 walls and 2 out of the 4 supports would be detachable without requiring magnetization or any real work beyond simply not gluing them, which is great since I suck at that kind of thing.
Also, turned around the C'tan looks like it has a passionate love affair with the Canoptek construct containing it...