I bought one off Craigslist before baby was born.
My sister gave me this, so this is what I've used when I need to park baby somewhere for me to do something. He really likes the mobile and lights, we've used this pretty much every single day. http://www.amazon.com/Tiny-Love-Rocker-Napper-Brown/dp/B0073DNYSW/ref=sr_1_5?ie=UTF8&qid=1354985442&sr=8-5&keywords=baby+sleeper+rocker
DS is over 3 months old, and I finally used the RnP for the first time this week. He has been sick (they think he has whooping cough, blah), and part of the care instructions they told me was to keep his head elevated when he sleeps. So for the past several nights, he's slept in the RnP. The size is really nice because I can pull it up right beside the bed so I can keep an eye on him better too.
I think the RnP would have gotten more use if I didn't get the Tiny Love Rocker. I'm glad we have the RnP right now though, even if it has barely gotten used, I wouldn't want DS to sleep overnight in the Tiny Love Rocker; I think the RnP is shaped better for not allowing the baby to turn in his sleep, even though they both have the seat-belt. Glad we didn't pay full price for the RnP though (I think I paid $20) since we've barely used it.