As title suggests, I just switched from a Surface Pro 3 to a base rMB and overall I am very happy. I used my SP3 and now this rMB as my main computer and thus far the rMB has handled everything just as well as my old SP3. Notice I don't use too many processor intensive programs - mostly word, excel, email, browsing, Win10 in Parallels, and (the most processor intensive thing I use) Bluebam Revu for viewing construction plans and other large PDFs. These PDFs can have up to 1200 pages or so and some with lots of detail. The rMB has rendered and handled these docs as easily as the SP3 did. If you're on the fence, I say take the leap and try this little mac out. BTW, I LOVE not having a fan....the fan on my SP3 was nearly always running it seemed.