[JimD]

I've used the Motive on my 128i. The quick disconnect at the resovor cap of the Schwannen seems interesting but not really necessary. Otherwise they look very similar. I don't fill the tank with fluid so I don't care what size it is. One reason I don't fill it is brake fluid is hydroscopic and it would be difficult to clean the large tank completely. So the second and all future times you use it, you will have some fluid from the last time, possibly with significant water in it, when you dump your clean fluid in. All I do is hook the tank to the master cylinder resouvor and pump up the pressure. I have to refill the master cylinder for each wheel but that is no big deal.

They are easy to use. Just pump up the pressure, open a bleed valve, and let brake fluid run until you're confident you've flushed the line.