I bought one of those exact kits last week, it'll take you around an extra 5 minutes to finish, above that of the $20 dearer reco'ed unit. If your not confident unscrewing 4 screws and pulling out the gear drive and motor, as well as unclipping and clipping the wires on the 12 volt motors...... or if you couldn't be bothered with the extra effort, then go for the reco unit, otherwise save yourself the $20. On my cars faulty actuator, the 12volt motor was kaput, and the plastic main gear was still ok. So I only replaced the motor. If a main gear breaks in any of my actuators, I'll have this spare, though touch wood I never have problems again.
Cheers