couple of the bikes came damaged, but the worst part was the complete lack of instructions. There are not dealers in our area so we decided to build ourselves. i was told that someone with average mechanical abilities could easily assemble. I hired someone with great mechanical abilities and it took him several days to build the bikes. No instructions or videos specific to the bikes we purchased made it really difficult. In a couple of cases he had to rig fenders because the piece supplied did not work. Bikes are nice once they are assembled, but i have concerns about durability and how long they will last.