[The_bluester (Paul)]

I have the superseded version which has a 12V input (The new ones have USB only plus an aux port for a temperature probe and hand controller, which I presume has a battery in it)

Mine has worked flawlessly for the couple of years I have had it. The only downside I can think of (Which was discussed on here some time back) is that on an SCT, and I presume this carries over to a RASA, the focuser can count steps for about 11 turns of the shaft and a Celestron SCT has about 40 turns of the focus knob. The fix is to get it ready to mount (With whatever mounting kit applies to the RASA) move the focus motor to the mid point of it's step count then rough focus the scope prior to fitting the focus motor, so best focus should be around the middle of the motors travel.