Twin strollers. ..

For my son who'll be about 1.5 by then and my newborn, I'm looking for a double stroller. We saw the Riley at Topmark and the Kees Loop 2 Go, I think? I personally think it's easier if the kids sit one behind the other because some store entrances are really narrow... but it seems cozier for the kids to sit side by side because if they're in a line, one always only sees half. Plus, the carrycots on these strollers seem really narrow, like they're made for dolls or something. I'm really curious to hear your experiences with double strollers!