I have a tandem, it was cheap $80 at kmart, I didn't like it at first ans still sometimes don't like it, but my kids are 5, 3 and 8 months. It works well for the 2 young ones now that the older one is walking full time. I suggest you go to babies r us or someplace where you can look at them and push them around a bit. put your child you have now in it and add some weight to the other seat with your bag or something, only you can decide which kind you think will be best. oh my 2 oldest are 21 months apart and one thing I did hate about the tandem is that I couldn't hear the child in the front very well, still have a issue with that. I have never used a side by side so I can't be of any help there.
at 1:18 PM on Jan. 23, 2010