After shooting the comet last night, I did a quick test of the iOptron startracker by pointing at Orion and taking both tracked and untracked frames at 70mm focal length. The exposure was 30s at f/4, ISO 3200.
As was already clear from the comet image, it does what it says on the box and tracks the stars! I didn’t spend very long getting an accurate alignment to the pole (in the dark and cold my motivation for fiddly tasks is reduced), but out to 200mm focal length and 1 minute exposures it seems rough alignment is good enough. The lower panels show a close-up of the Orion Nebula – it’s not the Hubble Space Telescope but I’m actually pretty amazed at the amount of color you can see with such a quick effort.