I don't have one, but have been looking at them as well.
Besides VSTankPro, there's another brand on ebay,
Trumpeter, and they're a little bigger at 1/16. About the same price as VSTankPro and they use IR guns too.
I don't think I'd want an airsoft gun, as I'm not into shooting BB's.
What I don't understand about the Trumpeter ones on ebay is that is says two tanks can do battle, but the listings show four different frequencies for four different tanks. So why couldn't four tanks do battle?
I'd like to get some more info on any of these as well, particularly in regard to how durable they are.