Highly recommend these tours! The vehicles are very comfortable, the tour guide we had for the Lower Loop was Sheri and she was great. Lots of fun stories and information, very friendly! They provided a very nice lunch and we enjoyed the lovely picnic area. We took the Upper Loop tour the next day with Alice and ended up with a private tour and had the bus to ourselves. She was also an amazing tour guide, knowledgeable, funny, and it felt like a good friend was showing us around. Both tours are wonderful and it's great to leave the driving to someone else while we could enjoy the scenery.