We certainly enjoyed our visit to Istanbul. Our guide was great and had all of the facts even if they were stuffed into a limited amount of time. We had a lot of sights to cover and he was good at letting us decide how we wanted to spend our time. The one difficulty we encountered was a schedule change that one couple didn't find out about. We started an hour earlier and wouldn't have known either but one of our party e-mailed http://www.turkeytouristguides.com and found out. The late couple said that no one answered the phone when they called to confirm. Other than this small glitch it was a great time and our lunch that was proveded was very good and introduced us to some Turkish food.
I'm glad you enjoyed your trip to Turkey. It would have been useful to potential travelers if you had included some details on what you saw that was good and what you particularly enjoyed doing. It is unfortunate that the only concrete information you gave us was the full website address of a guide service. Particularly so since that particular guide service has been spamming the site with ads disguised as reviews.
So c'mon back and tell us what sights in Istanbul you liked and why. Otherwise your review could easily be mistaken for another clumsy attempt to spam the forum.