Safe N Sound Urban 2
We borrowed one while on holiday and it is very basic. I would say it's suitable for kids under 4 as with a 4 year old you are allowed to wear a seat belt but you really can't with this it dosn't sit on the child properly and safely. Under four I would say go for it. I wouldn't buy one as I prefer to buy things I get more use from but they are cheap and very easy to clean.
If your looking for a cheap and easy to clean booster seat then this one is great. I bout one for my daughter and it has been wonderful. Target often has them on special ,just keep in mind that you will have to purchase a harness for it as well because of the new seat restraint laws.
we love this seat