First, the view of Horseshoe Bend and the experience of Antelope Canyon are well worth the drive. The sightseeing is 5 Stars for sure.
Second, from Sedona, where we were staying, it is a long drive. And, unfortunately, the tour that we booked really needs to upgrade their vehicles and our driver did little to enhance the drive. This effort was worth 1 Star.
Final comment, I cannot say enough about Antelope Canyon and our Navajo tour guide. The Canyon is spectacular and our guide enhanced the experience tremendously.