"ergo units are unique...this is an excellent one"4.0 starson by onlyauser
Pros: excellent setup for long hours at desktop
Cons: mouse thumb buttons/bad location/used to them now
Summary: I have been using ergo keyboards and mice for years. As far as the ergonomic design I feel this is the most superior product on the market if ergo's are for you this is the one to get. If you are looking for some comfort in a less daramatic design there are many more fine options.