I picked up one of these little mounts a few weeks ago as an "upgrade" for my Skyguider Pro. I like doing widefield mosaics, which can be a bit of a challenge with manually framing a target and trying to line up one panel to the next. This seemed like a good fit, since it would allow some more flexibility to align things with platesolving and goto.
Coming from a completely manual system, I haven't had any experience with ASCOM or driving a mount from a laptop. After installing various software (Stellarium, ASCOM platform, ASPS), I was surprised how easy this was to connect over USB to my laptop, and soon had it talking to Stellarium and ASPS. Cool! I could load a panel from a previous night, platesolve it, and goto the location, at least from the comfort of my living room.
I finally had a chance to try it in the field last night. All the software connected and talking, everything looked good. The polar alignment tunnel wasn't all that bad - I used my phone to roughly aim the mount north and used the angle finder to set the altitude. Took a peek through the tunnel, and Polaris was right there. I didn't bother trying to refine it beyond that, since I wanted to see how it would perform with a rough polar alignment. Manually aimed my scope at Navi in Cassiopeia, took a picture, platesolved it, and synced the mount to this location.
From there, I had it slew over to Gamma Cygni, loaded PHD2, calibrated, and took a 300-second exposure. Star trails. I figured it wouldn't all go smoothly the first time out, and this is where I started running into problems. I ran guiding assistant for 15 minutes or so, measured backlash, and applied all the recommendations. Took another exposure, and the trails are even worse. It appears that PHD2 isn't able to keep the declination axis under control, as the trails are oscillating back and forth in DEC. Since it was already set up, I had it run overnight to see how it would perform. It looks like I get a half dozen or so subs with egg-shaped stars, and then it starts wandering all over the place for another half dozen subs. I don't think I got any "good" subs, but lots and lots where the mount just appears to wander off in declination.
I think I saw some links for how to adjust the gears to reduce the amount of backlash earlier in this thread - I'm going to go hunt these down now. I'm using a 60mm f/6 doublet refractor that's nicely balanced, so I don't think I'm exceeding the capacity of the mount. Any suggestions for where to start troubleshooting the tracking issues?
All in all, I think this is a pretty decent mount for the price, and was surprised how easy it was to get it connected to my laptop... I just hope I can figure out why I can't get good guided photos!