The Sky Tracker Pro does an excellent job, accurate and reliable. But it took me much work to learn all the tricks needed to get best results in a clear black night.
For the $$ this is hard to beat. Very smooth and quiet when tracking, battery delivers as promised, I've done a polar alignment at 12: midnight and left the unit on over night so as to do imaging of the sun the following morning, and its still tracking accurately. All I had to do was to switch to solar tracking rate and begin imaging the Sun. Light weight and fairly user friendly even in the dark of night. Only two minor issues are, its a bit light on the max payload of 6.6lbs, my canon camera and telephoto lens comes out at about 7lbs. but still it tracks accurately. Also wish it came with or could have as an accessory, a 90 degree diagonal for the finder scope, sometimes you find yourself almost standing on your head trying to lock in polar alignment, a diagonal would really help. Aside from this its a jim-dandy mount for the dollar!