I received my FLR yesterday at Liverpool. The staff were friendly and efficient and it was very easy to do. We arrived at 10:30 am for an 11 am appointment. After going through the security line we were told to go to the first floor and wait for our number to be called. We waited for approximately 45 minutes and then were called to a window for the documents we brought to be reviewed. Since I had received entry clearance, all we had were the form, our passports, and our marriage license. We were then told to go pay (currently £250). We waited for approximately another 45 minutes and then were called to another window where we gave all of the paperwork to the very friendly woman behind the window who glanced through it and immediately stated that the visa would be available in an hour and we could wait or go for a walk and come back. We chose to leave for a pint and came back one hour later. We waited less than 10 minutes when I was called to pick up my passport (with its pretty, colorful sticker) and a letter stating exactly what I needed to do in 23 months (basically fill out another form, pay another fee, and show proof that we had been living together during that time frame). We were in and out in approximately 3 hours. We brought our own lunch with us, since we didn't know how long we would have to wait or what services would be available.
There were plenty of seats for people to sit in while waiting, two clean restrooms (m & f obviously) as well as a handicap/baby changing restroom, a photo machine (£3.50 for four photos), two soda machines (cans: 50p, bottles: 80p), a tea, coffee, and hot chocolate machine (25p) and a crisp/chocolate machine ranging from 50- 75p depending on what you got. As stated we brought in our own sandwiches without any difficulty and there were other people with baskets of food there as well. The staff were pleasant, courteous, and efficient. Hope this is helpful to other people who may be going to Liverpool.