I use it every year as I get access through my bank.
Not the best VIP lounge in the world but its quiet and I'm not getting stung by the crazy prices that they charge in the food court. The food can be hit and miss. One year we were there we got chicken nuggets and chips along with a big selection of sandwiches and cakes. Other times there has been salads and sarnies but some of the sarnies look like they have had one hell of a hard paper round and need scopped in the bin lol.
I think alcohol is extra on top of the entrance fee to the lounge but me and the missus never bother with it as as soon as we land back home I'm driving and my missus has had enough of alcohol due to all the cocktails she drank while in Içmeler
If I didnt get the entry through my bank (Barclays Premier entitles you to 6 VIP lounge visits across the world) I don't think I would bother but its the argument of value of the VIP lounge (or CIP as I'm sure they have it called) over the value of the food court (and their crazy prices).
I hope that helps