My friend bought a Zero electric motorcycle. A lot of fun and definitely has zip. Very quiet and makes almost no noise. He can hit a top speed of about 140km/hr but can not stay at that speed a long time due to battery overheat. It has a range of about 90km but their are bigger battery packs available for a price. The charging is slow and takes about 10hrs but again for a price you can pick up a fast charger which cuts down charge time greatly. Yes it is a fun bike but ultimately the range and speed ability plays a factor in usefulness of the bike. When I ride with him I constantly have to make sure I don't take off ahead or lose him. Also with a range of 90km you really can't go far. A trip out to the lake 30km away becomes sketchy if there is no power source out there to charge.

For me a good electric bike would have a range of at least 200km and include any fast charging with the base model.