I bought this kit from a third-party vendor at a launch event and it has since become a workhorse. The real star of the show is the clear payload tube and conical transition, which can be installed on any rocket with a BT-50 body tube (Alpha, Alpha III, Generic E2X, Cadet, etc.) and rigged up with a variety of payloads. I’d buy that on its own if it were available. There are a few third-party altimeters that can fit but my favorite device has to be LED lights for night flights, which are every bit as spectacular as you can imagine.
The instructions are clear, assembly is easy, and performance is excellent.