Alas, I installed my compatible cartridges in my printer last night, and found them not compatible at all. The printer refused to work with them, I put the old ones back in and managed to squeeze enough ink out to do the job I wanted.
This is by no means the first time I have been lured by cheap ink, but it will definitely be the last

Edited to say I just looked at your link, and it is £4 cheaper for the genuine article than I have found anywhere else, I might just give them a try