We went UC last Nov/Dec. as a special treat for my husband's birthday. I loved it.
We chose our seats online on the 'manage your flights' section. For some reason we could not check in online the day before - the website just told us to turn up to check in. That was fine because I wanted to walk the red carpet!

Just one couple at the desk in front of us and the pleasure of the greeter saying ' are you travelling PE this morning madam?' and me saying 'no, UC'! Lovely.You get given your lounge invitation there too.
We did have fast pass security which felt good, but really at that time we didn't need it as it was quiet.
The lounge is shared at Manchester so is not like Heathrow or even Gatwick which are Virgin's own. However we enjoyed it and it is just at the top of the stairs from the Virgin gate!! There was toast, muffins and pastries. Fresh fruit, whole and as a fruit salad, yogurt, biscuits, crisps and nibbles. Tea, coffee, softdrinks and alcohol. We stayed there the whole time, just popping down to look at duty free.
We went down to the gate early and waited near the gate to be asked to board - we were the second couple onboard after those needing help, and we didn't push and shove!!
We were off the plane in Orlando quickly so at the front of immigration. By the time we got to baggage reclaim the priority baggage was coming. Not long at all.
At Orlando for the return flight once you have checked in a porter actually takes your luggage from you!!
The lounge there is a shared one too and is very comfortable, but only provides drinks, biscuits and then later cheese and biscuits. Much better than the terminal though.
Baggage back in Manchester was not off first - Manchester are terrible for that. It was the same when we were with TCD Sunshine First. Not Virgin on TCD's fault! I rather think the Manchester baggage handlers do it on purpose!
That's all I can remember. Enjoy it!