Easy connection and excellent collaboration with Microsoft Surface products. Excellent for note-taking, satisfactory accuracy even for more artistic use, very good compatibility with several programs beyond OneNote and Microsoft's design software. The AAAA battery lasts comfortably for over a year, and there is an indication of its level in the corresponding Windows control panel. The downside is its durability, especially considering the price of the product. You need to be quite careful not to leave it free, for example, squeezed inside a backpack with books, as its electrical circuit is relatively sensitive. Mine broke within a year, and I had to get a second one. However, the magnet that attaches to the Surface is quite strong, so it will stay attached inside a regular laptop case.