The overall quality is OK, I guess. The top caps are too thin and are heated very quickly, so there's a chance for you to burn your lips. The delrin drip tips hardly prevent that from happening, as they are thin as well.

The MAJOR problem, however, is that the hexagonal grub screws of the velocity deck are from a very soft steel, so they are stripped VERY easy. I had to put in the spares after 2 or 3 builds.
If you can find proper grubs with philips or slot head, you'll be fine.