I spent the best part of 9 hours in Soho last Friday. It's a nice lounge with some decent sofas offering views of the airfield.
Drinks are good, food offering was decent at breakfast but the buffet offering through lunch and dinner wasn't great - however the 'made to menu' order was decent enough.
It was very quiet during the day and only got busy around the 1730 mark, but even then it wasn't too busy.