I bought HP compatable 300XL ink, colour and black replacement cartridges for my HP Photosmart printer. The cartridges worked for the first couple of pages and then stopped working as I kept getting error messages that they were not genuine HP ink and I could not print a thing. I tried the trouble shooting solutions but did not get anywhere. I spent 4 hours wasting my time trying to resolve the problem but got absolutely nowhere with the cartridges. Very disappointed with the performance of this product and it should be withdrawn from sale as there should be no need to have to be inconvenienced in this way. It should do exactly as promised, which it clearly does not. This is the second time I have been caught out by this ink, I thought I would give it another chance which was a big mistake thinking it was a one off fault. I will not be buying this product again as it was a complete waste of £30.00 which I may just have we'll have burned as the product went straight into the bin. Stick to the genuine HP ink is my advice to you.