Been 4 times over the years. Food is generally excellent but Turkish tap water isn't drinking water and sometimes they wash salad in tap water, hence getting the squits.
I also had bad food poisoning in Kusadassi when eating chicken from a rotisserie. The chicken and rest of the meal was delicious, but I was unaware the cooked chickens were stored on the bottom tray of the rotisserie waiting for customers. IIwas later told the chickens were rotating above spilling raw juices onto the cooked ones and soaking in.
The next morning I woke up really rough and the(then) mrs asked to me to go and reserve two sunbeds with our towels(german style)
I went down and put the towels near the pool no problem. I then dripped to my knees to be violently sick for what must have been at least 10 minutes. I only finished when my stomach was completely empty until retching on stomach acid.
On returning to our hotel room she asked why I took so long and when i told her why I took so long she said she thought i was inspecting the ants nest we had noticed.
I wasn't as such but I must have filled their anthole in. The stragglers that weren't in the best were probably marching back with bits of food on their backs, the little critters.
3 days in bed with no food, just bottled water. I didntd call a doctor but I must have had salmonella or something similar.
But i will go back to Turkey again as food poisoning can be had from anywhere in the world.
