The blueish one; we got one last May. My daughter loves it (she is six), but I am not impressed. It is hard to get the doll in and out of it, and you can't use a lot of the pockets when there is a doll in it. The main compartment is not deep - doesn't hold a lot.
On the plus side, it is pretty solidly made.
I guess I would just say, if you've got a doll in it, don't plan on using it to carry much else. If you want to use it for school, it is fine for a younger child.
Hope that explains it. We did not get the suitcase, just the backpack.