My friend just got back and was prepared to like the mickeybands, but she is not a fan. She said they are great when the work, but stink when they don't ...summary, kept losing fast passes for one person in their party, issues with loss of info for dining plan, and cast members would blame them for not knowing how to use them, in other words blame them for the bad technology, and she complained at guest services about specific cast members for doing this, being snide, sarcastic and overall disrespectful. I told her to write a letter, and let them know she has been to Disney 30+ times. She also was in the test group and checked in with her bands, she said she like it at first because it was convenient to just go to their room, but she thought someone would check in to say welcome to Disney. She said in the end she did not like it, because there was not conversation ever about their stay coming or going and it was a loss of Disney magic.
The second I made my fast pass ressies at midnight, I printed all of them and screen shot all my reservations for each day. This would honestly ruin the trip for me, spending 7,000 dollars, I would expect their system to work and that it is up to them to fix it ASAP if they do not keep up their end of the bargain. As it is I am not a fan of this overscheduling, the big brother aspect, changes of EMH's less than 45 days in when I had to make my decision based on their schedules at the time at 60 days out. NOT COOL!

What I have learned is have my ID, keep all documentation because the tech is highly unreliable. So much for traveling lighter due, to magic bands.