The prices are excellent and the cars themselves are good, Easirent are much cheaper than some of their more famous competitors. The value does come at a cost however; I have only used this company at Luton and their offices are a bit out of the way and you usually have to wait a while to get served, but if you're not in a rush or have a budget to stick to then they're worth it. Last two cars I have had from them were virtually brand new and in good condition.
All that said, don't bother with them if you ever want to see the cashback, my last booking with them was in Oct 2016 and it's now mid-May 2017 with no money in sight.
in summary, good cars, cheap price, out of the way locations and non-existent cashback!