The only suggestion I would have is look carefully at things like button placement.  We have Motorola V 190 phones.  They have button on the side that Dad hits almost every time he tries to use it.

You'll get a phone call, it will say on the caller ID it is him, and it will hang up.  VERY frustrating, especially to him.  I've seen buttons in similar locations on a lot of phones.

Looked at a Razor a friend has and the buttons have been rellocated so they are not hit as easily. I also liked the way it was a little wider and flatter than the V190.  It gets sideways in my pocket and is hard to dig out when it starts to ring and vibrate and flash all at the same time.  The Razor would not be as difficult to get out.  But like everything else, the one you REALLY want costs more...