My issue with the Conestoga is that there's no easy attachment/removal system. It's basically a permanent installation and it's a lot of metal framing to attach to your bike when you don't need it. I wish there was some modification that would make it attach and remove easily/as-needed.

Dear Hive Mind:  I just got my radwagon 4 and I've found that the removal of the battery is awkward.  I'm always on the cusp of dropping it when I go to detach it.  I was thinking some kind of custom strap that adheres to the sides (but not underneath) would help me keep a better handle on it.  Has anyone done anything like this?