The no-zip stroller is the best - absolutely no issue getting my two cats inside - they weren't too sure if they liked the idea of 'strolling' down the street.   After a couple of walks - loved the stroller.  I'm having knee replacement surgery and cannot walk without a cane.   The stroller eliminates the necessity for a cane - beneficial BEFORE surgery and I'm sure, after ...

Pros: East 'strolling' - front entry.   Neighbors are thinking of getting a stroller for their dog.
Cons: I can't think of any 'cons.'