I am in one of the two areas in North Carolina where they released them this fall.
I have wrestled with the blasted box (two different ones, so no, it isn't a defective device) the entire time. It is hooked up to my ATT DSL line, so they can't point a finger at my ISP.
It needs a clear signal to GPS before it will start (so it goes in a window... what, you want it in the middle of your house so it covers the whole house?) and the location better match where they think it belongs. It took the first FOUR weeks for them to figure out that they assumed it must be at my BILLING address (a PO box 5 miles away), not the STREET ADDRESS their own sales person typed in when I bought the thing.
It then took 6 weeks of calling, getting referred up the chain, supposed consultations with Cisco, being forgotten, restarting the entire trouble ticket process and multiple firmware updates before it would maintain its 3G signal for more than 5 minutes at a time. Every time they would download new firmware and assume they had fixed it without actually ASKING me if it was working. Hey, they downloaded the firmware to it, they checked it immediately, it said it was now online, all done, right?
It now only turns off the 3G service for a few minutes at a time, at random timepoints. It does however, drop calls after 4-5 minutes, and half the time when it thinks it is working neither of the two iPhones in the house see any 3G service available.
So why do I keep trying? Well, I am in a rural area and have essentially zero service in my home. I am on call for work pretty much 24/7 and it would make life easier for a whole bunch of people if they could just call my cell, period.
Bottom line, I can tell you why the MicroCell is not in widespread use - it just plain is not ready for prime-time. It isn't even ready for a beta test. They should be yanked off the market until they work.