HP's Smart Tank Plus 551 Wireless All-in-One ($399.99) is a bulk-ink multifunction printer that, instead of cartridges, gets its ink from reservoirs you fill from bottles. Like the Editors' Choice ...

HP's Smart Tank Plus 551 Wireless All-in-One ($399.99) is a bulk-ink multifunction printer that, instead of cartridges, gets its ink from reservoirs you fill from bottles. Like the Editors' Choice ...

The HP Smart Tank Plus 651 Wireless All-in-One is a bulk-ink printer that produces quality output and costs little to use over time, but lacks many of the convenient features of similarly priced ...