the Ergo keyboard 4000 be a really terrific keyboard have three significant benefit over my last favorite keyboard , the m natural keyboard pro . the first be the terrific riser in the front , create a negative tilt . to create this tilt on the pro , I have to elevate my wrist by use a piece of 2 by 4 cut to match the keyboard and then equip with a wrist rest . the new Ergo have both the height and the rest set up perfectly . note that if you have you keyboard set on a table or tray that be too high , this would be awkward . when the keyboard be set up properly -lrb- forearm parallel to the floor see site http:\/\/www.ergoindemand.com\/ergonomic-keyboarding.htm -rrb- , the Ergo be extremely kind to you wrist and the best I have ever use . the lift can be remove but please try to use it , the negative tilt be a terrific ergo device . the second improvement be that the key be much better . they take to edge hit much better than the old keyboard . there be also a lot less noisy than the pro . -lrb- there be indeed a dead spot on the extreme upper corner of the space bar but I have never notice it - I have to contort my thumb just to hit the spacebar like that and be a very unnatural -rrb- . the third improvement be the wealth of special key , especially the favorite key and the f lock and num lock key that remember they setting . the favorite can start a program that you choose while the other silver key can do command -lrb- like copy , paste , and exit -rrb- . the back\/forward button I find pretty much useless as I have these set up on my mouse . the zoom key be use to change text size which work well for my old trifocal eye . negative ? Pretty large keyboard , black , and the wrist rest be padded but not a cushy as my old gel one . this be the way keyboard should be make .