I buy the XL but am surprised they don't last all that long and I don't really use my printer all that much. I'm an old, old lady, so you can just imagine. I'm still pretty techie, however.
All HP ink in the 933 and 932 series are great. They are high quality with sharp and crisp lines that distinguish the lettering or photos very well. They all seem to last a good amount of time also.