This one, to be precise:
Bought it for the Nighthawk hoping that it would solve my HIM hydration conundrum. It won't. Also equipped it with Elite bottle cages (http://www.wiggle.co.uk/elite-custom-ra ... cage-2013/) which are meant to be a bit tighter than regular cages to prevent bottles from falling out. They didn't.
Ride No. 1.
Installed the mount, the cages, two water bottles and a spare tyre. It looked the sh*t. Until about 20km in, when the mount decided to just fall off. Presumably because it decided it could. And get run over by a couple of cars. Turns out the threads didn't manage to hold the two bottles in place and just gave in. Had to spend the rest of the ride with a bidon in my back pocket.
Ride No. 2.
Re-installed the mount using zip ties (and those screw points that hadn't broken. With just one bottle cage this time (moved the other one to the frame for the time being). About 20km in the bottle cage (brand new, had to buy an extra one after Ride 1) launched my bottle in the air. Not strictly the mount's fault, but I have a sneaky feeling te zip ties I had to use helped..
Ride No. 3 onwards.
Using set-up from Ride No. 2, but strapping the bottle behind the saddle with a strong velcro strap & exchanging once the front one is empty. In the meantime, waiting for my new Speedfil system to get delivered, which should hopefully be later this week / beginning of next.
Summary - doesn't work. Is evidently poorly designed / manufactured. Is not worth the dosh. Too bad.