Epson updated the MicroPiezo AMC print head in this new model with a coating that repels ink and is intended to better maintain dot placement accuracy over the life of the printer. It has also added a mist collection system that absorbs the overspray of ink when printing borderless. Over long periods of time, that mist can collect on the bottom tray and other points inside the printer and can cause errant marks on the tops and bottoms of prints. Though there is no built-in Ethernet connection, Epson includes two Hi-Speed USB 2.0 jacks on the back of the printer, so you can connect more than one computer, and using special software you can network the printer through a computer. If you like to print via PictBridge, there is a separate USB jack on the front of the printer for that purpose.
Setup was fairly simple, though given the printer's size, you'll want to set aside ample desk space. With its trays extended, the printer is 24.3 inches wide by 16.3 inches high by 31.4 inches deep, and Epson suggests that you place it at least 4 inches from the wall, since some papers will extend out the back during the printing process. Closed, the printer is 12.7 inches deep, so if you plan to let the front tray extend off the desk, you should plan for about 19 inches of desk depth, just to be safe.
While Wilhelm Imaging Research hasn't yet tested the R1900 to see how long its prints will last, Epson's pigment-based printers usually score quite well on his tests. The R1800's prints had a permanence rating of 104 years on Epson's Premium Glossy Photo paper when displayed framed under glass (and not even UV-coated glass at that). Suffice it to say, you should be able to expect prints that will last you a long, long time, especially if you store them in a dark place, such as a photo album.
The printer driver included with the R1900 is essentially the same as the one they use for all their Stylus Photo printers. It is easy to navigate, with four tabs at the top to move between different types of adjustments, and an otherwise intuitive layout with all the different options exactly where you'd expect them to be. There are even explanations of the various features that pop up when you mouse over them, and as a nod toward advanced photographers, you can set the Advanced tab (where you set color management options) as the default.
While not particularly fast as a document printer, the R1900 prints at a decent speed for photos. I was able to print a bordered 8x10-inch photo on letter-size (8.5x11-inch) paper in about 3 minutes, 28 seconds with the printer (instead of Photoshop) determining colors, quality set to Best (the top setting), high speed turned off, and the printer's Auto Photo Enhance feature turned on. That might not seem very fast, but everything is stacked against the printer in that situation. I must say, though, that the driver did a very nice job of removing the rather yellow cast of the photo I threw its way. With high speed turned on, Photo Enhance off, and quality notched down to Photo, I was able to print the same photo in 1 minute, 29 seconds. Letting Photoshop determine colors, using the excellent printer profiles that Epson provides, brought that time down to 1 minute, 21 seconds, though if you have an extremely fast computer, you may get even better results.
Epson's Stylus Photo R1900 is definitely a worthy follow-up to the R1800, though it's hard to say if it warrants a step up for R1800 owners. If you print a lot of portraits, you may appreciate the subtle skin-tone enhancements that the orange ink provides. While it's hard to notice at a glance, it becomes noticeable in side-by-side comparisons. If you regularly notice banding in your prints, the R1900's smoother transitions could seal the deal for you--I know they would for me. However, if cost is a big issue and you don't mind dye inks, or giving up the roll-feed option, Epson's Stylus Photo 1400 makes very nice prints, though it doesn't have quite as silky-smooth color transitions as the R1900.