I think it's a no brainer for anyone living in the US. I just had to have one, picked one up cheap from the UK, freight to Australia was about $130! If you are in the US, and you get bored of it, you can always sell it again, probably for more or less what you paid for it. But for us antipodeans, because it was never sold here, if it comes to Australia, it's pretty much staying here...
I haven't played it much recently, but I don't regret buying it. There is something I have to get done this year, and if I get it done, I've decided I'm going to build a sit-in cab for this controller. Will be quite a challenge design-wise, not least of all because the assembled controller is wider than your average doorway.
We are talking about the original version right? Not the kinnect version? I'm not sure what the point of a kinnect version is, to me the point of the original IS the controller!