I have the burley d'lite, but it is over 5 years old. I know the harness system on the newer ones looks more comfy, but I am not sure what else they have changed. Even with two kids (I have twins) I never found it overly hard to pull. I really like having the conversion kit installed, which turns it into a jogging stroller. Being able to hope off my bike and walk somewhere is nice, especially if my daughter falls asleep in the trailer, which she often does.