Summary: I have grown so used to this keyboard that I can't live without it now. After 3 years of heavy use the keys are beginning to stick and I need to replace it. I just love the integration of the trackball and mouse type buttons into this keyboard, it is so simple to use. The only negative to this design I have come across is that it isn't good for gaming so I bought a separate Xbox type controller for games.
Pros: Right size, long battery life, great trackball much better then a separate mouse. Good range.
Cons: Does not last forever, trackball needs to be cleaned on occasion requiring the removal of the keyboard cover.