My MIL gave us one for DD...She LOVES it. I find it really easy to use as well as I don't have to get her totally in and out of it during the night...just unzip the bottom. I also find it really easy to look after. Its a really nice soft material which is great. DD sleeps in it when she is in the car as well as it has a hole thingy through it for the seatbelt.
I knwo there are some similar things on the market but i haven't used them cause i was given this one...

hope this helps a little