As a person with MS the symptoms take a bit of getting used too. I now cannot hold a pen to write or draw with. This for a freelance Jewellery designer/maker this is not good. It just seems to affect me holding a pen and not hand tools. Weird I know. I rely on my old 17" MacBook Pro for everything from drawing to communicating with the outside world. Apple's trackpad has been a wonder and no other input devise comes close to its responsiveness. This poor machine has served me well for over 9 years, but now it is showing its age. It need replacing!! Does anybody know of a friendly/trustable/reliable place where I can buy a computer. An Apple iMac would be my choice. Thank you for reading this. Take Care.