I judge the color print quality as very good, despite it's not a photo printer. I've printed photos and renderings, as well as presentations and never been disappointed. Mac drivers are nice, and do a good job based on color profiles for various media.
Still works after almost a year. With my experience with some HP printers, it's a good sign. Average cost of page for the K8600dn (casual printing plus heavy-color printing) is around $0.12 per page with original XL cartridges and mostly letter-size pages with text.
Network interface is quirky. In a Mac environment, we constantly get a "broken connection" message, and need to hold-and-restart the job (no need to delete and re-print a job). Sometimes it will have problems recognizing the presence of paper. Other than that, I'd say it's a reliable machine, after more than 3600 pages, it's still spotless.
Note: careful about 3rd party cartridges. DELL store once sold us 88XL cartridges without the electronic circuit built in. The printer did not recognize them at all. By the time we found out, it was too late, as DELL refused to take them back.Get more detail about HP K8600DN Office Jet Pro Color Printer.