We used the lounge in May because of a 5 and a half hour delay with Thomas Cook! Big surprise! :
We'd never used it before either but couldn't bear the thought of endless hours drifting around the airport. It was very comfortable, plenty of hot and cold drinks though alcohol was extra. Food was fine for us. Not a huge choice, just a buffet but enough. Didn"t see anyone bringing other food in but that's not to say you can't if you ask nicely!
When you go to the desk they'll quote in both lira and sterling. They told us 135Tl or £27 each. I paid on my card in lira and it came back as £43.13 total! Oh, and take a plug adaptor in your hand luggage, plenty of plug sockets to charge phones etc. That's one thing we'll remember in future!
.