We've gone on a tour twice. We enjoyed the first tour in November when we took our nephew. He was 16 years old and loved it too. We decided to book another tour because of our experience the first time.
My sister and her friends were in town for her 30th birthday. We thought it would be fun to do this activity. It was fun. I would give them 5 stars for the first tour and four stars for the second tour. The guide this time was cranky and didn't take us to fun locations.
Tip: bring a handkerchief to wear on your head. The helmet rim is dirty.