My friend used to have one back in the UK. It's a very big chunky board, pretty heavy and solid construction. I think its aimed more at speed which is
someone most landboarders aren't aiming for but as with all flexi stuff it is well constructed. It was really good and keeping upwind from what i
remember - but then, it's pretty easy to stay upwind on most mountainboards!
Unless you are aiming purely for going fast i dunno if want a kava - it doesn't really provide any pop for jumps either.
Still though you should give it a try you might like it!
I personally like super light super bouncy-poppy boards so the kava didn't suit me!