I find the EDU kick drum to be pretty solid, especially for the price of the kit. The build itself is fairly straightforward and learning about the circuit really reveals how clever these early synth designers were in exploiting the properties of certain components and circuits.
Pros: the sound delivers a full round bass, with the design focused on two distinct tones, a sub-bass pulse with a downward-modulated secondary overtone, each with their own decay to help give variety and a semblance of realism to the timbre. The tone knob can dial in or out the initial "click" of the kick along with a pretty good distortion that doesn't really get too gnarly. The accent and pitch tuning CV can really help to add motion if used smartly and judiciously.
Cons: I have noticed that if the duty cycle isn't complete before the next trigger event, you can "re-initialize" the tone, which can cause unwanted modulation of the kick tone. I'm guessing this is just inherent to the design, and the work-around is just dialing in a decay length that suits the timing of the kick.
Overall, I'd give it a solid 4.5/5 when you account for features and control, ease of assembly, and price of the kit.