Bought it. Works decent, even over the internet. Not sure it's worth $25 but I figured $25 is a lot cheaper than a full blown windows tablet so...
It does give you a really good idea of what MS is trying to do with 8. Once you've paid for it you can always use it from here on out so it becomes less of a price issue over time. If you plan to even have 1 win8 machine, be it desktop or laptop, then this might be beneficial to get all the "advantages" of running win8 without giving up your iPad or having to carry 2 tablets. It actually works better in desktop mode than the normal Splashtop app since it's geared way more for touch. On the local network it's fast enough to stream media like any flash content from your PC to the iPad.
I agree that $25 seems like a lot for what it does but figure its a niche market, esp for iPad owners, and they didn't lie about the capabilities. They have to pay for the development of this somehow and I'm sure it wasn't cheap plus they don't plan to sell volumes of this app I'm sure.
Of note: you need the latest version of their free streaming app installed in the machine or VM you wish to connect to. Gotomypc charges $10/month for the same thing, and they limit it to one computer at that price, so this is really a good deal if you think of it that way. It uses a Google account to connect you over the internet (ie not on the same network). The Win8 app also works with windows 7 and I'm sure any other computer you have the streamer app installed on.
I have an iPad 3rd gen if it matters.