Look at those chubby cheeks!!
I suppose our definition of "exercise" is pretty loose.
This is Amelie at 5 months in the same thing - except we had to put books underneath so that she could touch the bottom:
And James (also at 5 months):
I'd say I've gotten my $15 worth out of it (since I bought it used on Craig's List). I think the only disadvantage of this type over the new kind they have is that ours is enormous!