I just picked this up and will be testing it later today on a Early 2013 15" rMBP with Mountain Lion Microsoft Sculpt Comfort Mouse (H3S-00003) For wireless, this one is bluetooth, comes with no receiver, and is around the size of a normal mouse. Despite being larger, it's not that tall, so it should easily slip into a laptop bag as easy as any other portable mouse. What I HOPE to experience from this mouse: Windows like cursor feel using Microsoft's IntelliPoint driver software. If the software doesn't let you customize buttons, I hope USB Overdrive can work along side MS's acceleration curve (By disabling USB Overdrives speed and acceleration options). Hope it's not too heavy by using light weight Energizer Lithium AA batteries. A cursor that is fluid and accurate for graphics with no lag or jumps, especially for dense interfaces found in 3D software. For the past 3 years I've been using an old Microsoft Optical USB mouse on a Mac at work. Found it in the office when I couldn't take the OSX's acceleration curve. It always felt too slow and then too fast, nothing in between. Installing MS's drivers and turning down OSX mouse speed, then upping the speed in IntelliPoint did the trick. Felt like a PC, plus no lag feeling. Before with the Mac software. I had no problem jumping across the screen with a quick flick (on a 30" display), but then the final move to a button, I'd aways come up short. It's like the acceleration curve is too sharp, on or off. It felt like I'd never get there because it was like almost no acceleration for precise moves, so I end up having to move it much further than expected. If I moved faster to compensate, I'd end up too far due to the acceleration finally kicking in. Adjust the speed to be higher so I can get around precise movements only made long distance moves unwieldy. MS Sculpt Comfort Wheel: At the store, I tested the wheel. It doesn't roll smooth like a free wheel, has bumps, but a bit smaller and refined, giving it a more solid feel. Only side effect of that, required a little more effort to roll. The wheel also has tilt left and right clicks, which were effortless to do thanks to the rubber material, finishing with a nice sharp click. You don't have to lift your finder and push it from the sides like other mice. A MS Wireless 4000 mouse sitting next to it required more effort for title wheel clicks, which to me would make it not cumbersome to use. Hope to program them to move left and right between desktops. Middle click felt good enough. I was testing a Logitech Anywhere MX mouse. It's wheel does both, free and clicks. Sadly, free can create some nice smooth internet scroll, it's too sensitive. Scroll down and then lifting your finger might cause it to scroll back up some, or it would be way to crazy in some 3D software for zooming. Clicking it to switch to bumps, that helps, but feels and sounds terrible at times. MS Sculpt Comfort Side Button: This mouse has a giant blue button. It also is touch sensitive from up and down swipes. I've read the se up and down gestures don't work on Mac, but I'm not sure about the physical click function. I plan to check if USB Overdrive will recognize the up and down gestures. MS Sculpt Comfort Shape: Initial impression, good size, but a bit flat. The groove/impression for your thumb to rest is nice, but unless you hold it just right, you might not like the sharp angle where the grove endes. The blue button feels a little far as it's in front of your thumb, not above like smaller back and forward buttons in the past. Anyone else have any experience with this mouse? I'll report how things work once I install it later today.