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.
Brina
"Truth goes through three stages: first it is ridiculed; then violently opposed; finally, it’s accepted as being self-evident." Schopenhauer