I have been using cells 5-12 regularly and they have behaved just like the regular eneloops. Cells 1-4 have been part of my self-discharge test since the first week in August 2010 and are still at 100% charge (using my ZTS MBT-1). That's 100% charge going on almost 30 weeks so they are doing pretty good so far.
It's rather amusing they call it the "Eneloop Bike" but if you have a look at the spec it's actually powered by "Lithium-ion battery 25.2 V 5.7Ah"
It's a rolling advert.
It's definitely a rolling advertisement for Eneloops but it's still pretty cool. I wouldn't mind having one but it probably cost an arm and a leg or most likely an arm, a leg and a foot. :D