I'm planning on building a pool next fall when the contractors get bored, and while I'd love a 75' lap extension to the thing, it just ain't gonna happen in my back yard. Soooo, I've been looking into some swimming machines, like the Swim Gym, the BaduStream/Jet, and the Endless Pools' Fastlane.

Anyone had any experience building these into a new pool? Any feel more 'real' or more difficult to swim in?

Oh yeah, I also can't seem to find any info on how much these things cost... Any guidelines?

Thanks!