I hadn't seen this topic brought up yet so I thought I'd put it out there.
The last two times I flew to the UK to visit my wife, the first of them I flew into Heathrow, and the Border Agency held me there for 5 hours, asking questions, probably looking up my history, and the second time I flew into Gatwick, and again, the Border Agency kept me there for about an hour and a half.
Now I have my spouse visa, and I'll be flying over to the UK with it at the end of August. After those last two experiences, I'd like to know what I can expect to happen when I get the airport with my visa in hand. Is that all I'll need, or will I need other documents with me? Would there be an interview or anything?