I have seen your excellent review of the Vado SL 4.0. You apparently have not yet reviewed the 5.0. Do you feel that the two bikes are similar enough that a review of the 5.0 is not warranted, or you just have not yet had the opportunity to do so? I would like to see a review of the 6.0 if you are so inclined, particularly comparing the 4.0 and 5.0. I have a Vado 1.0. I have owned it for a year and a half and it has proven so useful that i was able to sell my car. However, I find that I need more range and I want to go to an SL. I also wonder about how to sell the 1.0 and how to value it? It is in excellent condition, has about 3,800 miles and I have added a rack, panniers, rechargeable lights, and a Body Float seat suspension post, so, I have about $3,000 invested in the bike. I wanted to add to the conversation, that, at 76, and living in the desert (Scottsdale), the electric bike has proven to be a boon. I have been able to ride in 110 degree heat by using more assist, and, in the alternative, if I want a workout, to turn off the motor completely. I live on Social Security, so, I appreciate the $100.00 a month that I save by not having a car, not too mention that environmentally sound practice of using a bicycle instead of a car.