We used this for our first child, but decided to buy a regular pack and play with an infant sleeper for our second. My opinion is the co-sleeper took up way too much room attached to our bed-- hard to crawl around in the middle of the night. Also, putting baby to bed before we went to bed was challenging, as I would always manage to wake the baby just by crawling by him. Once the baby can pull themselves up, you also have to worry about them crawling into your bed unsupervised. Plus, the bottom of the co-sleeper, which is supposed to convert into a playpen, was very hard and uncomfortable for the baby. It is very difficult to pack up for travel as well-- not nearly as easy as a normal pack and play. It also does not have wheels, which makes it very hard to move. Another thing- it does not accept regular sheets- only special sheets made for this co-sleeper.
It was absolutely the best thing we did to move our 18 month old out of our room before our 2nd baby was born. We moved him before the baby was born so he didn't feel like he was being replaced. Not to mention I was waking every night visit the bathroom, and seemed to shake the bed no matter how hard I tried to be quiet! Our second slept in the pack and play until my son was ready to move into a toddler bed.