Epson’s EcoTank printers promise very low running costs over time, at the expense of a higher purchase price, and the Epson Expression ET-3600 EcoTank All-in-One Supertank Printer ($399.99) is no exception. In terms of price, capacity, and features, it fits between two of the previous EcoTank inkjets we’ve reviewed, the Epson Expression ET-2550 EcoTank All-in-One Printer and the Epson WorkForce ET-4550 EcoTank All-in-One Printer. These printers makes sense only if you print enough to justify paying a significant additional up-front cost for the initial bottles of ink that come in the box—in this case, what Epson claims is two years’ worth, or enough to print 11,000 black-and-white and/or 8,500 color pages. But if you do print enough, the ET-3600 can be a terrific deal.