I was there last week, evening to 2am on outbound and again around breakfast time on the way back. There was a lot of people, but I managed to find a comfortable spot. Cleaning of tables was quick, choice of food was nothing special (I didn't sample the indian and then chinese food window), choice of beverages the same. Wifi was good for me, using Netflix, and the censured Wikipedia isn't really TK fault...
All in all is a decent lounge for me, not the best but surely better than a lot of others
PS. For the first time I tried the direct access from landside: very convenient!