The bike's absolutely wonderful and we are very glad that we went with the Davinci. So far we've ridden about 350 miles (including a hilly century). Unfortunately we've reached the end of our riding season here in the Chicago area, so we probably will only get out on it maybe 1 or 2 times more. Debbie is having problems with the seat even though she is using the same comfortable seat (Terry Sport) from her single and a suspension seatpost. So we're thinking that she may have to go to a "comfort" seat. We're also adjusting the seat height which is helping. We're not very confident with standing, so we're thinking that we need to learn to stand and shift position more, because we're in the seat a lot more than on a single. I do find that I'm very busy as the captain and have to shift a lot, because tandems accelerate and decelarate so quickly in hilly terrain. I find that I don't have time to drink and my right wrist gets stiff because I'm constantly shifting and on the brake hoods. Communication and coordination has not been a problem.