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This is really not all that different than the one used on a Steve Nash transmission in the C4s.
Having said that, given that the lowest price unit is $1530 at a show price and that you'd need a separate controller, I think that you'd be much better off with a 200-4R. Less work to install too.
700R4 swap like mine is not that bad in terms of price - only $1,300 delivered from "fourth gear inc" in Florida.... they have a great rep and mine works beautifully. Will have to change or modify cross member and emergency brake cable.
There is also a "gear vendors" overdrive which actually a small two speed planetary gear set rated at 1000 lbft. The best part is that you can keep your current trans., and even set it up to automatically computer shift between gears to give you ----> 6 <---- total gears!!!!!!!! They will send you everything you need, and the cost, if I remember right, was only an extra $600 beyond what my 700-R4 cost me......just out of reach for me