My G11 has performed flawlessly, as have the vast majority of those sold, I bought it with the plain digital drives and now have put a gemini 2 on it. I've been on Losmandy forum for a few years and can't say I've heard any real horror stories? Anyway, I like mine, and it will guide well at 1100mm focal length. I've seen plenty of great images with these at up to 2m focal length, but i suspect that's about the limit.
As for the gemini 2 system, it took me about 30 minutes to fit, and within two nights I had the whole setup doing plate solves and meridian flips with SGPro.
Have a look on the
astrobin site, you can search on types of equipment and see what others are producing with the eq8 or G11.
cheer,
Andrew