I am writing this review as far too many have had problems when ordering HP 364 ink.
The main issue is that HP has 2 types of black ink. One for normal printing (Pentagon symbol) and one for photo printing (Bowtie symbol). The set I ordered from InYourBasket took 4 days to be delivered and postage was free. The 4 inks came in a single "multipack" set and not sent individually like some sellers. The information on the box shows C, M, Y have a yield count of 300 pages and black comes in at 250. The use by date was in 2013 so no issues there. The printer recognized straight away that the inks were genuine and the "first" test print was perfect. Buying these on-line is the best/easiest option as I find that shops only tend to stock the odd 364 cartridge. All in all a pain free experience and will use InYourBasket again.