The burley's are expensive but worth it I think. I bought mine used and it is awesome. I have the D'Lite and it is great, I especially like to use the stroller attachment with it for trips to the Zoo and so forth. It is MUCH easier to push than a stroller. I have heard of Burley's rolling (not because of the trailer but because of the operator, I have never even come close to rolling mine and that has included 20 mph turns) and the adults finding the kids laughing because they thought it was a fun ride.