Hmmm:hmmm:
'Sure seems like a long way for Junior to fall. I think I'd prefer one of those third wheel thingies that clamp to the seat post.
When my critters were that small, I wouldn't have used this thing. A "light" fall is a big fall for Jr. and it could be compounded my mom/dad landing on Jr. Plus, it would seem that one would be more prone to falling with that weight up front.
Not the worst thing I've seen. I saw a guy up at Mahlon a few months ago with a toddler in one of those backpack carriers. It was shocking enough to see this guy hammering up the hill by Rock Rill with Jr. playing "let's f*ck with daddy's CG", but as they passed and I saw Jr....well, he didn't even have a helmet on!! The rails of the pack were pretty large and would've provided quite a bit of protection during a fall, but still....
I say let Jr. ride his own bike and keep it to places that match his size and level of ability--they'll be infinitely better off. If mommy and daddy want to go riding "for real", find a sitter.