Summary: I am giving the keyboard a low grade because it really disappoint me on how it is sensitive to distance. I bought it to use with a Minix Android device in order to control my Restaurant Queue. The Device is around 5 feet distant from the keyboard and in this little distance I was having and intermittent response. Replacing the batteries did not fix the problem. Switched it by an IBM Mouse/Keyboard set and it worked perfectly.
Summary: Definitely feels and works like a $15 dollar wireless numpad. Also, it has a range of like 3-4 ft with no obstructions. If you have something like a keyboard in the way, forget about the connection.
Summary: My wife bought one of these for use in her library. The students punch in their library numbers and then she scans their books. The kids, interestingly enough, enjoy taking part in the process. We also bought a laptop that does not have the full keyboard, but with the classes my wife is taking she needs the number-pad...solution! Both keypads have worked flawlessly, the first for 6 months and the second for a month, we like them.
Summary: So this touch pad works just fine, if you have the dongle pointed directly at the keypad unit. After reading the reviews, I was curious to see if this keypad was really as bad as they say. I have a USB extender cable, so having only a couple feet between the dongle and keypad isn't an issue. I connected the dongle to the extender and placed it on my desk. Placed the keypad on my lap (about 2 foot distance). Doesn't work.
Summary: I ordered this product for my 4-8 year old students to use typing in their library numbers when checking out books. It works wonderfully. I have been using it for about four months now and I don't have any complaints. The one thing I would state is that it does not work very well when it is more than about 10 inches from the computer, which works fine for my purposes.