Not sure how much you have, but I started with $10. Played 1c/2c for about a week or so and got up to about $40. Then I entered a couple of CC $5 MTT's and took 2nd twice to get me up to about $140 or so after 3 weeks. Then I played some 5c/10c and some $5 SNG's to get up to about $240 2 weeks later and swapped funds with a friend. I just wanted to consolidate to 2 sites for purposes of moving up in cash stakes, etc.
Juicy? I'd say the micro limits are about the same as Stars & Tilt. What I do notice is that the cash games run faster. About 60-70 hands per hour vs 50-55 at the others. I'll also say that I think 25NL and up is probably a bit tougher than the other big sites. U.B concentrates more of it's marketing in Europe and you get a decent amount of good Euro players at the higher end. The downside of this is that the SNG's do take longer to fill at night in the US when the Euros are sleeping.
I'd say to try to do what I did. Build it up to a decent little amount. If you still like U.B, stay. If not by then, you can swap out funds with someone. However, I personally don't think I'd deposit there again after the recent discovery of cheating there (in addition to what when on at their sister company, Absolute). It's a shame too, because I really love their software.