I took a United flight from London back to San Francisco a week ago. There are two United flights, one is a 300ER (reviewed separately), this one was a -200. But refitted with the new 1-2-1 Polaris biz class and (more pertinently) 10 abreast economy seating vs the previous 9 abreast. They changed the config of the plane after I reserved my seat, I saw that when I went to check in and noticed that they had changed seat. For the better it seems, they assigned me an aisle seat (which I had booked originally but that changed when they changed the aircraft config) with no one sitting between me and the person sitting at the window. And that stayed through the flight (even though the flight was relatively full).
Food
They had vegetarian option for lunch which was available at my seat (about half way through the rear cabin). This is contrasted with the selection availability on my outbound flight. The snack (about one hour before landing) had turkey, there was no option (outside of special meals). Even though the lunch had a vegetarian option, the meal wasn't particularly appetizing. That seems to be a theme for United meals lately.
Infotainment, Space, Staff
In many respects, this was the same as the -300ER, same options. And same lack of options Once again, the "from the flight deck" was not enabled. Pity.
Restroom
In one respect, there was a difference from the -300ER. The restroom had a smaller sink and the tap was sprint loaded, not auto sensing. Both aspects render making wudu (ablution) more difficult. Some restrooms didn't have cups, others did. There were plenty of paper towels to clean the restroom once I was done.