I had the chance to check these out several years ago. Bob Duncan of Wheelie Fun MultiSport in Lebanon, OH adapted the idea from the blokes at MDT. After pitching the design like a snake oil salesman for a while he finally got Profile to take them to production. They are not a lost-core product, so they ended up a bit beefier than they could be (wait till you see FSA's new clip ons!) They have some adjustment on the base bar, but none for length. I haven't ridden many miles on them, but have tried them out on a bike adjusted for me. They seem nice and would be a good fit tool where a "compact" fit is needed. Their low stack, and simplistic design are both benefits and limitations. At $250+ I'd suggest you buy in person rather than roll the dice with a mail order purchase.
If you are ever in Southern Ohio, drop in and see Bob. He, and his store are the real deal.
-SD
https://www.kickstarter.com/...bike-for-the-new-era