Canon is well-known for not having good ergonomics... their system of dial plus button presses have always been criticised... It's only belatedly on the 7D that they have adopted the systems that KM first implemented and inherited by Sony and then also adopted by Nikon. It's called dual thumb dials with dedicated buttons for most exposure elements... I've tried using a Canon 1Ds, 1D, 1DmkII, 1DmkIII, 5D, 5DmkII and they all are pretty bad in terms of usability... once you have used either a Sony or Nikon or Pentax system, you will have difficulty trying to use a Canon cos it takes a lot of fiddling to find out how to change any settings... it's that bad... you've got to try it... I noticed that most people new to Sony or KM can pick up the camera and use it after about 10min... I have passed my cameras (7D & A-900) to my students who are complete newbies and they can figure out how to use it.... whereas I have been shooting with DSLRs for some time now and I just can't figure out the Canons... I had to ask the owner for help for almost everything... including simple things like changing ISO, change focus mode, focus point, switch from AF to MF, review and deleting, rotating photos, etc... pretty horrendous experience for me... plus there's a lot of menu diving...