I've been sky diving before

And I assure you, it was one of the best things I've ever done!

From looking at the website it says it's a tandem jump from 100,00 feet with a freefall of up to 40 seconds at 120 mph, which is the same as the jump I did.

One thing they didn't warn me about is the when you first leave the plane you normally do a few flips and generally get thrown around a bit because of the wind and air pressure. It's a bit of a shock when you're not expecting it, so just be aware!

I've heard of plenty of 'wee-splat' stories, but most of those were by solo sky divers, if you're gong tandem it's pretty safe.. I guess you don't really need to hear any of those stories though.. But good on you for doing it, I assure you it'll be fun..! Well that's if you're as much of an adrenaline junky as me!
Have fun!