For much less than $900, you could have your guitar fitted with an Evertune bridge that stays in tune all the time for you anyway. I know they have different functions, but the intended result is similar (you don't have to tune). I don't see how this is worth even a fraction of $900, unless there's something I'm missing?
edit: just realised the dates on this thread... was way before Evertune hahahah oops