I just ordered one this week. I had never seen/used one until last weekend at the derby down here.
What a piece of machinery, I cannot believe how well it works!!!
I was set on getting a showdown, but like you wanted to see it work first and unfortunatly noone around here has them.
Once you try a Vex you will be hooked.....Mine will be here tuesday, so says the ups site, and I will be on the ice an hour later using it!
Good luck!