With so many choices, is one "better" than another? Keypower, side power, Vetus, American Bow Thruster etc.
The boats I've run with ABT's, from what I've seen they were well engineered systems and built well and plenty of power. The only issues I've seen were with a seawater coolant pump, and a bad solenoid on another one. ABT came out with 12 hours on the situation with the bad solenoid. I don't have much if any experience with key power.
There are a lot of very good brands on the market, electric and hydraulic. Some of the famous brands are the following: - Side Power - Lewmar - Vetus I have been using Side Power thrusters for years on my boats, both hydraulic and electric with no problems at all. My current boat has Side Power hydraulic thrusters, bow and stern and "touch-wood", I have not had a single problem in over 2 years.