Mini Co-Sleeper Question

icedcoffeeluv

After reading the thread below about the Arm's Reach Co-Sleeper I realize I made a mistake when registering.

I didn't realize that there was a mini and an original. Buy Buy Baby doesn't even offer the original. I planned on using the one I got which is a mini for both babies in the beginning. Will this not work? When I looked at it in the store it seemed like it would be big enough for both. It was bigger than any bassinets I saw.

WWYD? Should I return and try to find something bigger?