Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Reception stinks, but everything else is fine

On a fresh set of batteries, this keyboard is barely able to transmit a signal 2 meters, with clear line-of-sight to the antenna. It is pathetic; at this range, one in ten keystrokes just doesn't go through. It doesn't help that it uses the same 2.4 GHz band as the WiFi, so the keyboard stops working any time there's an active download, and the WiFi stops working any time you type.Physically and ergonomically, it's great. the sides make very good handles, and the trackball and mouse buttons are well-positioned. The built-in trackball is nice when it works (same reception problems, plus it doesn't track fast motion very well). Overall, however, the reception and interference problems make this a poor design.