Whether on your lap or on your desk, the TK820 is "tastefully modern" according to GadgetMac, who called it as "stylish as they come." KitGuru also found it "subtly elegant," and noted that its design makes it "well suited to a number of uses." The one design nitpick to be had was the lack of retractable feet, which means that those who want to adjust their tilt angle will be disappointed, though GadgetMac says the built-in angle is already optimal and should "please most users."
The keys themselves have "an impressive amount of travel" that Expert Reviews found "springy," and GadgetMac says they offer "incredible tactile feedback." The touchpad will take a bit of getting used to, though -- About.com noted that the left- and right-click sections of the pad are "not clearly marked" and they kept accidentally brushing their arm over the touchpad while typing. CNET is also disappointed by "the lack of of support for Macs," meaning that while it can be used with some key remapping, the TK820 isn't a good substitute for an Apple Magic Trackpad.
The Logitech TK820 is a solid keyboard in look and feel, but the touchpad elevates it for casual users and makes it a useful device you'll appreciate in both your office and living room.