I've bought the HAMA mouse because I suffer from a syndrome and RSI me the constant click hurts with his forefinger. The HAMA mouse installed without problems under Windows and can be combined with the attached program individual program. I can now, for example with the thumb click on the page and the relieved but very. The mouse fits comfortably in your hand, is robust and responds well. A further advantage is the automatic shutdown. If you do not work for a few minutes, the mouse goes into the battery-saving stand-by mode. The only negative: the USB receiver is not very stable and breaks easily. HAMA offer an alternative receiver for about 13 euros, which is not exactly a bargain. I also had problems that the receiver got stuck not always tight enough in the USB connection (ASUS Netbook), so it has come to Kontakabbrüchen. Conclusion: For people looking for an ergonomic mouse and do not always want to work only with the index finger, the HAMA mouse is recommended to deal carefully with the USB receiver you have.