J.O.
We just bought one with our taxes. I picked mine up at Wal-mart, for around $110. It has the extra wheel attachment for a stroller. I am very happy with it. We use it weekly for with my 8 month old.
While brosing in Costco the other day, we saw they had one in for the season. It had all the features we had, but a much sleeker style. I belive it was around $180.
When we originaly started looking, I wanted to get one at a bike shop. They maintaince them for life it purchased from their store. The cost would have been around $200 + more for the stroller attachment. Then I stumbled across the one at Wal-mart, and I think I am just as happy with it.
My girl-friend who's daughter is now 12 used one when her daugher was 1 until about 5 years. She purchased her's at Toy R Us, and had wonderful luck with it.
Ours will fit two comfortably! We've even tried to squeeze three, but it was too cramped for them.
I love mine...and I was told I could not use it until my baby was older. But he loves it so MUCH! We live in a very tiny town, and I don't go on any main streets with it because I can't find a helmet to fit my baby.