My missus picked up one of these instore after spending what has been an age looking at suitable car seats for our 4 year old. Compared to many other seats, this one has decent padding around the head and a very comfortable seat to sit on. It also converts into a booster only seat if required.
Seems a decent bargain to me as was £79.99 and is much better than the cheap seats you can pick up for around £30.
Don't forget ye ole Quidco too.