Summary: If you are having trouble with your trackball, try sticking a tiny piece of paper behind one of the ball bearings. This seemed to help position the trackball for better performance. Keep it clean too. The rubber strips on the sides may start to fall off over time.
Pros: Best layout of any HTPC-style keyboard/mouse. Price is reasonable. Great range IF you get one with the older, larger style USB receiver (the one in the picture as of this writing is the one you want...black part should be about an inch long). Trackball so-so, but it's fine for light/normal use.
Cons: I've actually bought two of these over the years. First one lasted me a long time, but eventually some keys came off and got lost (my toddler's handiwork). I bought the exact same model again, but this time it came with a new, much smaller USB receiver. The range with this new receiver design is ...
Summary: I bought this just to use with my LG smart TV. Not all functions work with my TV such you cannot copy and paste. Also you have to push the keys down hard. I have no problem with the mouse as some reviews were negative on the mouse. For me it works Ok.
Summary: I use this to control my laptop through my TV, so it is basically a TV remote for the most part. I don't have cable, so I use Netflix through my Blu Ray and things like NFL Rewind on the laptop. I do scroll the web and check emails, but not as much as I do with my PC.
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.
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.
Summary: This really is a solid contender for a must have for any HTPC. I keep it on and in my drawer for whenever I need it. All you have to do to wake it up is hit a keyboard key (trackball/mouse click don't count).
Pros: Great range. Battery Life is great with auto turn off (keyboard wake). Does everything as advertised.
Cons: Trackball gets worse with time. You have to press it down to make sure it "tracks" more and more. Not 100% in that department but it is still managable