I've used this a couple times with our 10 month old, he loves it, it's secure, I feel that he's safe and it allows us to get out and ride on dirt (mostly fireroads).
My issues are 1. there is no space for my knees (I'm on a full suspension mountain bike) and there doesn't seem to be a way to correct for this, its just the design of the seat and bike geometry. I can still ride, but have to have my knees out wide, after a couple miles, they hurt, long term there's potential to really jack with your knees.
2. You do lose A LOT of turning radius up front. We aren't riding singletrack with the offspring yet so it's not a huge deal, but it's very restrictive.
Because of these, I've honestly considered just riding with bebe in a backpack instead and/or waiting until he's older for a cockpit style seat.
Read More