If you use one, what brand/size are you planning to use?
I was looking over the weekend and tried a few out. Our first one was a Graco and we liked it but sold it because it would expire before we planned to have a use for it. It went up to 22 pounds but my kids outgrew it in length by about 8 months. Now there are ones that go to 30 or 35 pounds. I don't think I really want a bigger one though.
The one I thought I wanted was really hard to buckle! It was a baby trend one, and kind of tricky. Also the handle only clicked in two positions, which bothers me for some reason. The graco ones buckled well but the chest clip seemed much flimsier than our first seat.
I have the old Graco travel system stroller but I don't know if it will work with a new infant seat if I get the 22 pound one. So I really don't even know if we want a set or just the infant seat. And I really want a jogging stroller. Just so hard to decide, but this is the one thing that we HAVE to have pretty soon.