I finally started commuting to work on my old Diamondback MTB with the Dillenger 1000w kit linked below: http://dillengerelectricbikes.com/e...tric-bike-kit-10ah-upgraded-by-dillenger.html This kit was only $809 when I bought it on sale a month or so ago. It's $899 normally. Shipping is $50 more (to Florida). Here is my info: Terrain: Flat (Central Florida) Route: 17 miles Weight: Rider is 220, plus 10 lbs of work clothes and lunch Bike: Normal no-suspension mountain bike, Diamondback Traverse, 1.5" street tires Battery: 48 volt, 10 ah This kit worked well for my first commute. The battery level meter was only down halfway after 17 miles with no loss of power for acceleration. I rode on PAS level 4 (out of 5 total levels) the whole way, maintaining between 20-21 mph with many stops/slow-downs for intersections. I have a 13T cog in the back (freewheel), and 20 mph is a pretty easy cadence. The motor is very quiet, I could only hear it when accelerating from a stop. Court's review of these kits notes that the racks tend to slap around when hitting bumps, and this is still the case even with the rubber Dillenger provides to try to stop it. I am next going to try putting the battery in a frame bag so that I can use the rack for my cargo. This should quiet things down some.