Thanks! I was thinking about the Cub for the hard bottom, but I decided on the Burley d'lite model for the extra elbow room/growing space. Since our twins are only 9 months now, we will be waiting until they are 1 year and then only taking them out on paved trails, so I'm not too concerned about a hard bottom at this point. Also since they are so young, I have absolutely NO time to drive all over the place looking at used bike trailers. Most are selling w/in hours on Craigslist...in MN...in Feb (middle of winter here!). So I opted for the 2012 close-out model on Amazon for $400. We'll be using it for 4-5 years and will sell on CL when our kids have outgrown it.