We did the Turkey trip a couple of years ago.  We booked it trought the rep, however all the trips the reps do are sold in Lindos for less.  It was a good day, however I am not sure that I would recommend it to anyone.  We were taken to the Bazaar in Marmaris, where we went to a leather shop, then to a carpet shop,and finally to one that sold T-shirts.  There are about 3000 shops in the Bazaar, all seling the same things!
After a couple of hours free time we than boarded our coach to a Turkish Delight "Factory".  However we did not get to see any being made 

   Then after that it was back to the coach and onwards to the entertainment.  Turkish dancing and a meal.  Then back to Rhodes.  As I said, a good day which I am glad we did, but it did feel like a big sales push.  I think I'd rather go back to Turkey and see the country for what it really is.  
The only tip I have is to pack plenty of sunscreen.  The heat in Lindos is not a patch on Turkey!