Just been on the 2 day trip with Pioneer Travel - cost £42.
Had a really good time - would have cost as much to do on your own - example - entrance to Pamukkale 20 lira over the door - they gave us prepaid Tursab tickets which cost them 10 lira.
Included 2 breakfasts - both very basic Turkish - but still ok - a decent standard overnight hotel with a decent 3 course evening meal.
We stopped on both days at a bufe style place where I am sure they make a good bonus and the food was average - cost 12 lira and 10 lira but again - overall excellent value!
Ian