The Incurve name refers to the noticeably concave surface of each key: Instead of a flat top (possibly with a small dimple or depression in the middle), each key's entire surface is concave, making it easier to locate keys by feel and to press the center of each key when typing. The surface of these keys is a bit too slick for my tastes--sometimes my fingers felt as though they were sliding around on the keys a little--but the concave shape means that a finger never actually slips off a key. And the overall feel of the keys is very good: I like the Easy-Switch's keys a little more than the keys on the K760, which were slightly loose and "jiggly." Overall, the Easy-Switch's keys rank among the best Chiclet-style keys I've used, and they're considerably better than those on Apple's current keyboards.
The Easy-Switch features a full complement of standard keys, with everything in its proper location. There's even an LED Caps Lock indicator on the Caps Lock key. (If you've installed Logitech's Preference Manager software for the Easy-Switch, you can opt to also see an on-screen notification whenever you toggle Caps Lock.) Of course, as a compact keyboard, it lacks a dedicated numeric keypad, as well as Home, End, Forward Delete, Page Up, and Page Down keys, though you can accomplish those five actions by pressing the fn key in combination with Left Arrow, Right Arrow, Delete, Up Arrow, or Down Arrow, respectively. Similarly, fn-Escape emulates the Sleep command.
One drawback that's becoming increasingly common on keyboards is that the F-key row is a single, uninterrupted line of keys flush with the top row of the main keyboard area. This makes touch-typing more difficult than it is with the traditional layout, where the F-keys are arranged groups of four, and the entire row is separated from the main keyboard area by a wider space. At least with the Easy-Switch, the F-keys are rounded, so a touch-typist can more easily differentiate them from the number keys.
Every time I tried to write the conclusion to this review, it ended up being nearly identical to the one for Logitech's K760--just updated for the Easy-Switch's unique features. And that's because, solar charging versus backlit keys aside, the two keyboards are very similar. So without any pretense of originality, here's that updated conclusion: The Bluetooth Easy-Switch Keyboard is one of the best Mac keyboards on the market thanks to an appealing design, good keys and key layout, and a nice batch of special-function keys--in this case, for both OS X and iOS. The Easy-Switch lacks the luxuries of an extended desktop keyboard, such as a numeric keypad, but it makes up for those omissions by providing multi-device Bluetooth support and a design that makes it small enough to toss into your bag. These qualities make it versatile enough to be the primary keyboard for your desktop Mac, your MacBook, and your iPad or iPhone--without sacrificing full-size keys or a standard key layout. Along with its sibling, the K760, it's the most versatile keyboard we've tested.
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