Have this and we really like it. The bouncer part has a lot of trouble if the child moves around a lot (it has to build up a momentum/rhythm that's easily broken). But if he/she is moving, then he's also creating his own bouncy action, so it's not a big deal.
We're on our second set of batteries in three months--not too bad.
The included toy thingy isn't of much use to us, so we removed it and got a "Tiny Love Take-Along Arch", which also fits on our car seat:
I definitely recommend it over the vibrating models.