My husband surprised me for my 60th birthday with this fantastic e-bike. I have been using it reliably for 5 weeks now. I had conversations with the manufacturer several times and they were great in answering all our questions. You will not go wrong with this bike. Speed is good (reasonable for my needs!). Acceleration is fast. Battery lasts a long time. Everything you could want to stay active and enjoy cycling without the pain of getting up the hill. Read more on the Darrvin Connect here.