I've only used my Bixpy twice so far, but I've got a good idea of what it can do and the issues from the factory. The first thing I'll say is that I'm pleased with the performance of the jet and very impressed with the battery. The jet works fine on it's own, but it works beautifully in conjunction with the Mirage Drive. Bixpy's slogan "Life Boosted" is very fitting, as I find this unit performs best as a booster than a stand alone propulsion system, which is exactly what I wanted. In general, it gave my loaded down Outback a 1 mph boost at all speeds of normal peddling, at 1/2 throttle. Top speed for me was around 5.8 mph, but I felt very comfortable between 4.5-5 mph. The main issue of the universal setup stems from the plastic retainer clip of the vertical shaft. The clip is meant to keep the motor positioned vertical, but it does not provide enough resistance to use reverse. So basically you have no reverse with the universal setup as it comes from the factory. In addition, lowering the unit can be cumbersome since there is only one rope that is designed to raise the motor, which means the motor has to thrust itself into the down position. I fixed both of these problems by adding a lower rope that attaches to my seat with a small piece of Velcro, which still allows the motor to kick up if I hit any obstructions. Based on others experience, the Bixpy is somewhat sensitive to sand, gravel, and other items found at the bottom. That being said, the universal setup is definitely the way to go since the jet is fixed well above my fins and rudder. The Mirage Drive mount will definitely hit bottom first, and the rudder mount kills the turning radius. With the universal setup I keep my Mirage Drive, keep the sailing rudder, and provide maximum protection for the Bixpy.