We purchased a tour that literally had "30 minute" in the first two words of the description of the tour. And it didn't even last 20 minutes! That's more than 33% less than what we paid for. Unacceptable.
To be clear -- the tour itself was fine. But to not even provide 20 minutes of flight time, let alone 30, was misleading at best. And it's not like they were running late or had any other customers waiting!
I would normally say that perhaps we just had bad luck with the pilot or something, but after having said "I thought it was a 30 minute tour, that wasn't even 20!", his reaction indicated to me that this might just be the way things are. Which is wrong. We really feel like we got misled (at best) or lied to.
I therefore cannot recommend this tour operator. And if you do decide to go, make sure you confirm the exact number of in air minutes you're getting.