After a little research, I found this bike had the best battery, the assembly was a breeze, quality shifter components, and the fenders was a bonus as some bikes don’t included them. I purchased and tested one and was so impressed I bought 3 more. Everything just works very, very well! It can cruise roads, grass, and sand just fine. I enjoy riding single track trails and I keep up with the kids on their non powered specialized bikes just fine. I usually pass them on the uphill sections. Black diamond trails are not a problem. I wouldn’t recommend jumping logs or riding high speeds on the rough trails (remember it’s an 68lb bike) but if you keep a comfortable pace, it will not disappoint. I recommend about 25lbs of air in the tires for paved roads and 10-15lbs on the single-track rougher trails while riding slower, about 10-15mph. Overall, I am very impressed and enjoying these bikes more each time I try a new trail system!