Phaetus Pump Set (without Hot-end)

So, it's fine, except the following:
1: there is no PWM signal going to the pump, so it only runs every 2-3 seconds for like a second. The only way to get this pump to run all the time is to supply one of the pins with a continuous 5v supply.
2: it leaked because the reservoir wasn't screwed down properly.
3: the parts are the cheapest of the cheap. the pump is a standard chinesium pump from AliExpress, and the buck convertor is the lowest quality one I've seen.

Basically, yes it pumps water, but you could probably make it yourself with parts from AliExpress for like 25% of the cost and have it be infinitely more controllable.