I've been a professional photographer for many MANY moons! Up until about 5 months ago, I used an Epson Workforce 600 printer as my everyday printer... for documents, and everyday photo printing. For documents, it was an excellent printer. It was also "good" for printing photos. However for my important gallery photos, I use my Epson Stylus Pro 3880... a professional photo printer. The problem with the Workforce 600 is that it used Durabrite ink, which is a pigment based ink. In the past, all pigment based ink had a problem with glossy paper called metamerism. That's a property where the ink sits on TOP of the paper surface. The results were that when viewed under different lighting conditions the color appears to shift a little bit, and even caused "bronzing", especially in the blacks when viewed under spectral lighting. This effect was most noticable in black and white prints. Also, when viewed at certain angles the images would appear less glossy and uneven when going from lighter colors, or clear, to dark colors... almost like a negative image!
My latest SMALL printer is the Epson Artisan 810 printer, which uses Claria ink... a dye based ink. No more bronzing or metamerism! The glossy prints have an even gloss and truly look like regular photo prints from your local pro camera store!... some small drug store labs still give you prints with uneven gloss... or semi-gloss. Also, Claria ink adds two more colors, Light Magenta and Light Cyan which means that you get a potentially wider color gamut (depending on your color settings) than you do with the old Durabrite 4-color ink system.
The problems with pigment based inks have been pretty much eliminated, due to micro encapsulation of the ink droplets in the best pigment based inks. The encapsulation surrounds each droplet with a polymer, which almost completely eliminates their previous problems. I am extremely happy with this color pack not just because it saves money over buying the cartridges individually, but also because it uses Claria ink!