My use case for this is to run SkySafari Pro 4, with the SkyFi box, to control my Celestron AVX telescope mount with a 6" reflector, and my SCB-4000 lowlight video camera for doing video-assisted astronomy.
It does this most admirably, and works very well when out at the scope, and it makes it easy to go chasing magnitude 15 galaxies from my backyard. Locate object in the app's database, center on screen, and tell the scope to slew from the screen. Then, I can see that celestial object on my portable screen.
When I got the tablet, I was aware that the bootloader was locked, but I knew there were alternate roms available via XDA developers forums. The one that I ended up using, SlimLP, renders the tablet pretty much a bog-standard low-end Android tablet. All the installed hardware works well, the bluetooth and wifi are perfect, and when I'm not using it for stargazing I have it on the coffee table for those quick web browses about subjects that pop up when watching my tv shows. The battery life is pretty good, I charge it about every 10-15 days when not in use, and it'll easily last for a full stargazing session when I'm outside.
Yes, the standard OS install is pretty crappy, but once it's rendered as a standard Android tablet, it's proven to be perfect for my particular use case.