Pros: Great keyboard for the price, truly professional, and amazing build quality.

Cons: Only one con I have found so far. Sometimes the keyboard does not work at all (happened twice) and I'll have to unplug and replug the the keyboard.

Overall Review: Other than the one con this keyboard is flawless.

Pros: Responsiveness of the keys is great. Very sturdy frame The minimal media controls and hibernate button is well thought out.

Cons: None really other than this is a bit expensive, but if you type as much as I do ... well worth the cost difference from a membrane keyboard.

Overall Review: Number lock, caps lock, LEDs are bright. Does not effect anything as it is not blinding when you are working in the dark but it does create a good nightlight on the ceiling. (Don't let this discourage you from buying - not a negative just an interesting tidbit).

Pros: the one i'm using has the brown switches. i preordered it through das, and wanted to write a review about how amazing the keyboard is. i had the older professional das s version with brown switches as well, but this keyboard is far superior. -usb 3.0 with nkro -media buttons/volume knob are awesome -cherry browns: i've had blacks and reds, but browns are the sweet spot for me -build quality: i've owned filco, steelseries, das s, logitech, rosewill; the das 4 is superior in every way -gaming: just incredible -magnetic ruler? i haven't used it yet, but i guess it might come in handy -other thoughts below

Cons: none so far

Overall Review: i was worried that the edge around the keyboard would be sharp and get in the way. my wrists never actually even touch that part of the keyboard so it's a non-issue. the volume knob is exquisite. it makes a small sequential click noise, almost like a mouse click. i've used the media buttons while using itunes, and it's both instantaneous and seamless no matter what other program i'm using. the overall quality and ease of use is absolutely worth the cost of entry. there's no extraneous features, just exactly what you need in a quality keyboard. this is an amazing keyboard for typing, gaming, and everyday use. i don't want to stop writing this review because it's that enjoyable to type on. combined with my Func mouse, i feel like i've found the perfect combination.

Pros: - Absolutely fantastic feeling when you depress a key. I had the Das Keyboard S Ultimate prior to this one and I could tell a difference immediately. Strange, I thought, because they use the exact same switches--Cherry MX Blues. I told my brother about it and he thought maybe it was simply due to all of the wear I from using the switches for years but after testing the number pad of the S Ultimate, which I never used, I was able to confirm that there is something altogether even more fantastic happening beneath the key caps. - The breadth of options and the quality of the build made this well worth the upgrade for me. I love the aluminum face plate, the audio controls and built-in USB hub. All features that I use.

Cons: - This thing is pricey but you get what you pay for.

Overall Review: - If you spend as much time on the computer as I do (probably close to 80 hours a week) then do yourself a favor and buy one.

Pros: Clicky. Makes my typing appear with fewer errors. Maybe Placebo? Two USB 3.0 Passthrough Ports (hub). Audio dial, media controls. Loud clicky sound if that is your thing. I love it!

Cons: Not backlight like 4q variant. The 4q has a backlight, but lacks usb 3.0 hub. So 3.0 hub vs 2.0 and Non backlit vs rgb backlit.

Overall Review: I have had this for maybe a week and a half, and it has been a wonderful typing experience. Few errors in typing and has a satisfying result while typing with a clicky feel.

Pros: The MX Blue switches feel so nice. They are very clicky. I work on the phone a lot and people mention how loud it is occasionally, but I like it because they know that I'm working when my keyboard is clicking away. The media functionality is fantastic, I absolutely love the volume wheel. Build quality is superb.

Cons: The price, but it was so worth it especially for a keyboard that will last this long.

Pros: Top quality look and feel. Great key touch. Excellent keyboard.

Cons: Stopped working 5 months and 4 days after placing in service.

Overall Review: do not buy from this manufacture