I was quite surprised how good the SP3 trackpad was. It is good enough to make a mouse optional rather than mandatory. I too use an MBA 11 on which, yes, the trackpad is a bit bigger and better. The difference though is not jarring so even moving one to the other the SP3 trackpad is still enjoyable to use.One important thing for me coming from a mac, track pad control! I have recently owned the yoga pro 2 and the sp3 at the same time. Without a doubt the sp3's track pad is smooth and precise. I also zoom a lot in internet explorer and zooming in IE on the yoga pro 2 is awful. I am not sure what Microsoft did to get precise control but it's the closest thing to mac track pad control I have found.