Lovin this keyboard
But the first thing you need to know- like the other guy said the NUM lock is set on when you boot up every time, this basically means that because some of the keys are shared with numbers you end up typing numbers when u want letters, so all you need to remember is to hit that NUM lock at startup otherwise you will have trouble entering your password !
With that aside I think this is a great keyboard for surfing the web from a distance through a large TV. The trackball is actually much much better than i thought it would be, bearing in mind to turn the mouse sensitivity down to get it just right. Once you have got used to it, it becomes second nature.
It has a very nice feel to it overall, does not feel tacky. Had no troubles with connection or range.
If you wanted to use this as an everyday keyboard for work this may not be suitable for you as its quite compact and may be difficult to use over long periods of time.
I am using this with windows XP and all the buttons work exactly as they should:
On the left you have the Internet hotkeys: forward and back, open Explorer, open email, and my computer.
On the right you have the media keys: track forward and back, stop, play/pause, mute, and master volume up/down.
Another guy said in his review that the click wheel is easily pressed- not true in my case quite the opposite so it may have been a fault he was experiencing, although he was right about the clunkiness of the keys, they are sturdy but dont let this put you off.
As i said prob not ideal as an everyday work keyboard- think home entertainment and emails.
The ONLY cons i have found would be that the CAPS or NUM lock have no lights to indicate when they are on, so sometimes if a password is coming back incorrect you need to use your brain to work it out but you get used to this!
The only reason for this I can think is to save battery life which I cant comment on as I havn't used it long enough yet.
I would recommend this product if use you pc for multi-media from your bed or the sofa !
Buy one !