A great lens for a very good price.
If you want to shave off a few more pennies and you can live without the 12month warranty, going second hand via auction sites etc might cut the price down to around the £200 mark. Harrison Cameras also had a few of them for only £200 a few weeks back, but they went QUICK!
You can get it new from Dale Photographic (http://www.dalephotographic.co.uk/mall/productpage.cfm/DalePhotographicOnline/_P10NA03950A/462360) for £349 which is the lowest price at the moment, so CEX saves you £100 which is always good!
If you use the lens minus the hood, it gives you quite a nice portable setup for general use.
---Edited to add more info