I got my electric bike kit a year ago at
www.wildernessenergy.com (I got the brushless kit, now discontinued). It has been so great! It has about 1700 miles on it so far. I love riding it and the best part is it's silent and very stealthy. I blow by lycra-clad road bikers and they can't believe what's happening. It's funny to see them stand up on the pedals and try to keep up, meanwhile I'm barely pedaling and enjoying the scenery. It cruises at 20mph (with very light pedaling, maybe 17-19mph with no pedaling). Range is about 10-20 miles, depending on how much pedaling I do.
There are a few things I don't like about the Yaris. The main thing is the throttle-by-wire. There is a slight delay for throttle input, so when I shift gears the engine revs up slightly, and then slowly comes back down. It's annoying. I almost bought the auto version for that reason, but I'm getting used to it so it's not so bad. The Nissan Versa I test drove did the same thing. Also the Yaris is low geared. At 3000 RPMs in 5th gear I'm going 66 mph. My toyota truck is geared like that in 4th gear. It can't be good for fuel economy but so far it's doing pretty good.
Other than those two things I love it. It feels like a bigger, more expensive car than it is. I read somewhere the Cd is 0.29, pretty good but it's tall so it could still be draggy.
My Scangauge came in the mail today. I immediately took it for a test drive... it's incredible! I'm sure my mpg will be increasing in both the Yaris and the Tacoma.