I bought a 'Cornerstone' c/w a 5 pack cheap off E-Bay and believe this uses much the same blades. Not too bad at all for a 'quick escape' razor or when you can't be bothered. Weird seeing the blade flex so much in use.
I have picked up a starter special offer. It has come quickly but will have to wait a few days. If it is no good as a lead razor it can be used as a travel piece as, being a cartridge I can get it through our airports.