C.M.
The Sit and Stand is the best. It's lighter than your typical double (and less $$) and it's not a side by side, so you don't have trouble fitting it between doors or into the car. The Infant carrier fits in the front with a detachable bar, and the older child can sit or stand (obviously) in the back. Worked great for my 3.5 yr old and my infant back in the day...they are now 7 and almost 4 and still ask to ride in it.