a group of 3 of us did the intermediate tour and we really enjoyed it. it was good value for money.
BEWARE though as Viator advertise this as firing a grenade launcher. They haven't been allowed to fire these by the government for 4 years. They have notified Viator on numerous occasions but they haven't updated the website. we only booked this as it stated you fire them, if it hadn't stated it we would of booked with someone else.
THIS IS FALSE ADVERTISING.
that said i'm glad we did book but i will think again before using Viator in the future