Carnival's zipline/cave tubing excursion?

[enymarsh]

I really want to do this excursion when we are on our Carnival cruise in a few weeks but my husband is afraid of heights and doesn't like moving fast. So... my question is... how high up is this ziplining experience? I read one review that said this was not that great for experienced zipliners but beginners would like it. It appears there are only three runs and I wanted to know if they are sort of slow and not too high...? I've never done this but I like new and exciting experiences so it seems like a perfect time for me to try ziplining, just would rather not leave dh on the ship! We are a very healthy and active 58 and 60 and both of us would welcome the walking involved in this trip.

 

Thanks for any information you can provide on this excursion!