I'm using it now - there are a few bugs but that's expected as it's beta, but, apart from that, it's wicked! I think it's better than TF2D / TF3D, very fluid. At the moment, it appears to be lacking a screen lock and a volume changed (like the older versions), but it's a very good start, as good as I expected it to be.
There's going to be a free and a "Pro" version, differences between the two can be seen
here, by the looks of it, I think I will be happy to pay for the Pro version.