Some getting used to, but great.

I would like to but the following things:

- The M515 is a wireless mouse. Although the many Logitech mice coming to use receiver is not - as touted by Logitech 'tiny', but very small. It projects only slightly above the laptop case also. The danger of dropping out or tear it is, therefore, not given. When transporting your laptop it can get stuck.

- The mouse is ergonomically very comfortable to hold, and it is good to use. For me personally it is a bit too heavy. This is due to two AA batteries that come in the M515 are used. For Logitech holds out the prospect that a battery change after up to two years is required. The long battery life is supported by an on / off switch on the mouse and a hand detection sensor (that is, the mouse goes into a sleep mode when it is not moving). At this point enters the mentioned in the heading 'habituation need' a. The hand is not directly accessible via the mouse or is not enclosed by the hand, the mouse is not moved. Take time to move the cursor by the mouse is only pushed, therefore does not always work. This is not tragic but just a bit strange. How long the batteries will be ultimately really persevere to be seen because I have the M515 only been just over a month.

- The lower surface of the mouse is very flat. Lint or the like can not block the sensor. Logitech M515 advertises the fact that it works well on soft surfaces. That's really really good. Sitting on the sofa, feet on the table, the laptop on your lap, the mouse on the sofa seat or a pillow - no problem. The mouse controls precisely on uneven and soft surfaces.

Conclusion: for under 30, - Euro is the M515 - if one has gewäöhnt to the hand detection sensor - a great device.