I have had this trailer for over a year. I did a lot of research before buying a trailer. Positives:
Incredibly Stable
It does fold up
Wheels easily removed
It works well as a true jogging stroller, proper front wheel
Easily converted from trailer to jogger, no tools
Sits two children comfortably
Has the highest weight capacity of all the trailers
Negatives:
Does not fold up quite as small as they would have you believe but it folds without tools unlike every other trailer
Is a bit heavy to jog with
Acts like a sail in high winds(benefit is you do get a good workout!)
Overall this is expensive but very well worth the money.