WHat can i say it takes a while to get used to but once you do it's really good. the keys are nice and soft for people who struggle with finger issues yet still maintains the satisfying click as you push down on the button. It types well and is nice to use. it's very large so just be aware of that.

Feels very goodQuite comfortableWonderful more buttonsSolid Windows 7 support- no challenges, simple set up Takes up a lot of spaceSplit style may well take some acquiring employed to I had an older All-natural, and loved it. Purchased this for my newest program, and adore it.

There is no more comfortable keyboard to use. It's that simple.

This is a great keyboard, I write a lot so it is important to me to have comfort while I write. With this keyboard there is no stress or strain on the wrists or fingers at all. I will buy another if anything ever happens to this one.

The Microsoft Natural Ergonomic Keyboard 4000 is a small but interesting step forward for Microsoft. While you may be familiar with Microsoft's Natural Keyboard Elite Pro which has been around for almost seven years, the Natural Ergonomic 4000 adds a curved keywell to the split, tented design.

Aside from my key switch and programmability complaints, this is a great keyboard; The additional parentheses keys above the numeric keypad are a huge help when doing calculations; The range and number of programmable additional keys is good, with application and program control extended to anything...

This keyboard would be the perfect; all around productivity keyboard if it had professional quality mechanical key switches instead of the membrane key switches found in almost every consumer keyboard on the market.

Keyboards don't get any better than this -- at least not with currently available technology. The Microsoft Natural Ergonomic Keyboard 4000 is quiet, comfortable, and overall a joy to work with. Highly recommended to anyone interested in a more comfortable computing experience.

We checked out a mouse/keyboard kit about a week ago and today we have another keyboard from Microsoft. I have always been a fan of the natural keyboards and was sad to see when Microsoft released the less natural keyboard, but boy was I wrong.

If ergonomic keyboards are your flavor, this is the cream of the crop. A comfortable padded wrist-rest lays your hands perfectly on keys that are raised, lowered, and sized according to your propensity to strike them.

Lastly, PCMag.com's Joel Durham recommends the Natural Ergonomic Keyboard 4000 as the best reasonably priced keyboard. The Microsoft Natural Ergonomic Keyboard 4000 has been on the market for a relatively long time, and most professional reviews are on the old side, but even newer comparisons and...

Comfortable; Easy to use; Customizable; Mac compatible

No USB hub; Stiff keys; some say; Noisy spacebar

Poor typing posture can wreak havoc on your wrists, but few people take the time to correct such hazardous habits. Enter Microsoft's Natural Ergonomic Keyboard 4000.

Good design; padded palm rest,

Little too expensive