I had the previous generation M600 wireless for a couple of years and it was a great mouse, got it for a good deal, under €40, it even has USB-C. The battery lasts 2-4 weeks. The only problem is that it's bigger and heavier (107g) compared to other mice. With M600s, according to the specs it seems they addressed that issue, it lost some weight, it's now down to 75g and an overall smaller size. Can't wait to try it. It looks like they were able to cut down the weight even further in the final product. In the announcement it was 75g, on the support site it was 73g and now on the lenovo store and on amazon it's 69g. To reduce the weight, the battery life went down from 200 hours to 70 hours. Edit: There are 2 models of this mouse, one with Qi charging (73g) and the other without (69g). https://www.lenovo.com/us/en/p/accessories-and-software/keyboards-and-mice/mice/gy51h47355 https://www.lenovo.com/us/en/p/accessories-and-software/keyboards-and-mice/mice/gy51h47354