The colors and shapes of the canyons (we did both upper and lower) were fantastic. Our tour guide in upper was very knowledgeable, but we got someone on their first day at lower so they didn't really have much to contribute unfortunately. We preferred lower because the walk was definitely more fun with some tight spots and narrow ladders. At Upper Antelope Canyon you enter right at ground level and it's a flat walk from one end and back. Upper was also extremely crowded, as in we could barely walk through the canyon crowded. You've got multiple tour companies going in with their tours at a time, which makes taking pictures and enjoying the canyon a bit challenging. It was still worth seeing at least once, though.
the tour guides are great at helping with pictures. And being there is just as beautiful as any pictures you've seen. it's a busy place, be ready for delays and the sun. the crowds make the canyon warm so bring water. it's a crowded tourist spot but a must do!!!