I have been using one of the "chicklet" keyboards that came with my IMac last year - and frankly I simply don't like them. Given that I'm experienced touch typist, I did some research on keyboards to find a better one - and came to the conclusion that the DAS Keyboard was the best one for me. It contains metal key switch mechanisms which provide a positive "click" feedback when typing (which reminds of my old IBM Selectric typewriter - yes I am that old) and two USB ports on the right side of the keyboard.
The only "relatively minor" negative comments I would make are:
1. There are no keyboard volume controls - like those on the Mac keyboard - however, I use the volume control on the menu line which works OK for me.
2. Having used Macs since 1983, I know by touch where the command and option keys are so that is also not a problem given the DAS Keyboard has different symbols for these two functions.
3. Another comment concerns the highly polished base into which the keys are imbedded. I find it attracts dust easily - so I put a cover over over the keyboard when it is not in use because it is too easy to scratch the polished surface when cleaning it - even with the little slip of cleaning fabric DAS included with the keyboard. As a result of this comment, I recommend the manufacturer make the keyboard base in a finish similar to that of the keys.
FYI, it took very little time to become proficient with the DAS Keyboard and I would certainly recommend it to anyone who is an experienced typist.
I have rated it 4 stars (it could have easily been 5 except for the minor problems noted above) and that's a high rating for a picky evaluator.