Our family of 5 (kids 12, 14, 16) will be in Istanbul 3 full days in early June. Staying in the Old City. Our travel agent thinks we should do day tours (mainly because she's worried about our safety and ability to navigate a strange city, I think), but we usually prefer to see things at our own pace and have no qualms about using public transportation or our own feet. Isn't this feasible and more cost-effective than an organized tour? I'd love to hear both the pros and cons of tours, especially from people who have traveled w/ teenagers. Thanks!