Hi there!
We bought a bike basket when we had Jessie, she wasn't too crazy about it but seemed like she felt safer when it was on my husband's bike. Since Jessie passed and we now have two little ones we thought it would be great to get another one.(Good price on Petedge.com). Well we tried it last weekend just for a short ride around the block. Willow went with hubby and I took Jake in the new one. Though our new one has a mesh zipped top, I didn't close it all the way, nor did I have our 3.5 mnth old Jake harnessed tight enough....he was petrified and tried to leap out!!!!
It was really scary. I don't think he liked it much....Willow seemed to enjoy it. Maybe Jake is just too young...but I would suggest harnessing them in real good and keeping it closed on top until your baby gets used to it....hope this helps....