Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: short working range, picky on mouse-pad or surface color, be aware!
Review: I definitely agree with the assessements of other two buyers. This mouse won't fit your palm (the name "mini"), but the most annoying is that it works only on dark, block surface colors like dark blue, and it won't work on green, red, mixed, or white colors. The other thing you need to know is that its maximum working range is < 23' from the USB plug. Don't recommend it.
