Orkney for us was rainy, windy and cold (just bad timing), but we were able to book a tour with Orkney Tours and it was a great time. Our tour guide (Vita) was very knowledgeable, very friendly (as was our driver) and was very willing to adapt the schedule to suit the interests of the group. The company is relatively new on the scene but the guides are experienced. The 6 hours allowed us to see the main sites on Mainland Orkney that we wanted to see and weren't competing as much with the cruise ships. Highly recommend this company.