Since our office all got SP3s we've had a lot of growing pains (we were running Windows NT) and getting used to 8.1 so I'm reserving my judgment until I've spent more time with it. However, my initial impressions is that it has wonderful build quality, is light and fast, and works well as a mobile workstation... but the tablet experience is not what I'm used to with either iOS or Android (although still better than a budget Android tablet).
Handwriting / Drawing and OneNote has been great, though, and that fulfills the company's goals for adopting the SP3... most of the time. I've had an instance where we've been asked to turn off our device, even in slate mode, thus frustrating its purpose in those situations (apologize if I'm being general, but can't be more detailed than that).
Anyways, as a laptop it's solid... the only thing I'm really missing if using the type cover alone, is a middle mouse button. Anyone have any tricks for implementing a middle mouse click?