Love it, highly recommend.Scroll - Excellent - Up/Down, Left/Right. Smooth motion, sensitive , no lag. A pleasure.Aesthetics - Excellent - It's gorgeous. I went with 'Sage' (ie green), I feel the soft matte patina and muted pastel color could align my chi. ; )Portability - Excellent - Best portable mouse out there? V likely. It’s light, collapses to a slim iPhone like profile, u can put it in ur pocket and the biggest bonus is in a bag; there’s no bump.Pairing - Excellent - Putting the Arc in pairing mode is easy enough, press a small button on the base. It is easily discoverable, super quick to connect (to anything) and no lag after connecting, on par w Logitech MX's.Build Quality - V Good - It looks/feels expensive, materials r top notch. While it’s build quality is v good and the collapse/expand mechanism will hold up the Arc isn’t quite as durable as a Logitech MX Anywhere 2S. Don’t get me wrong it’s better than just about anything else out there but the price point puts it into Logi MX territory.Software & Customization - V Good - U can download Microsoft’s ‘Mouse & Keyboard Center’ app. The app installs quickly, detects the device without any hesitation and u can’t tell it’s there (doesn’t affect system speed or boot time). The app allows for button & scroll customization. It has a broad selection presets and you can add your own key combos, the preset selection isn’t as good as ‘Logitech Options’ but u can get around that by entering keyboard shortcuts. Something to note is u don’t need the app (unless you want to customize), the Arc is great without it.Palm Fit - The Arc fits nicely in your palm, it’s arch angle is well contoured and it’s v light. I found myself using it with my thumb and middle finger tips.3 Finger click - Excellent - It's customizable and works every time.Battery Life - Not sure - Business partner has an Arc, hence can expect at least 1yr. The Arc comes w 2 x Duracell AAA batteries. I like the way it’s not rechargeable.Wake up time - Excellent - No wiggle necessary, it's almost immediate. If you look for it you can see a .4 or .5 inch movement is all it takes. Please note that also depends on the system it's paired with.Final thoughts. If u r looking for aesthetics + performance this is for u. The Arc is a premium product that delivers on everything; functionality, performance, portability and looks/feel. I especially like it's light weight and the way it eliminates that awkward computer case/valise/bag bump. Where it falls short is within this price point it should have multiple device functionality. That feature is more than a 'nice have', a portable mouse always needs to connect to more than its primary device (for multiple reasons). This missing feature is kind of a big one, hence I deducted 1 star. By comparison the Logi MX Anywhere has 3 device options. Would I recommend the Logi MX over the Arc? No. The Logi has a slight edge on functionality but the Arc is an overachiever in it's own right and more than perfect for my purposes.What Microsoft should do is compliment the product with a desktop version...Add volume, fwd/rev functions but still make it collapsible so you can easily carry it between meetings or stick in your drawer etc..