Having lived with a SP3 as my primary computer for 6 months now, I have mixed feelings about the type cover. I actually think that the touchpad is just fine - in fact for basic use, scrolling, mousing, etc, it is virtually flawless for me, among the best I have used on any PC. It's a little more troublesome with moving things around, but I think that is half that it's a bit too small and half the fact that Windows still doesn't have great drivers for that kind of touchpad use. It would help a lot of Windows would store my mouse pointer setting permanently! For whatever reason that constantly gets reset.
The keyboard itself is passable. If you don't much care about what you type on, then it will probably be just fine for you - it's on par with most inexpensive keyboards. I use a separate keyboard most of the time, as I'm fairly particular, but I've learned to live with the type cover and am about 90% as fast on it as my good keyboard, although far less comfortable. I would like to see them make the key presses a bit crisper, and shape the keys in some subtle way to make locating each key a bit easier - right now they are spaced so closely together and being completely flat it is difficult to tell one key from the other.
As a tablet, it's still not as good in many ways as the iPad, but better in many others. What I love about this device is how flexible it is. I can be working docked to my 4k monitor at my desk, pop it out and grab the pen to go to a meeting, pop it in my bag to go home and use it as a tablet all evening. Under most of those circumstances it takes up far less space than any laptop that would be replacing it, and by removing the type cover it can sit on my kitchen counter unobtrusively. Our workplace is in the process of beginning to integrate Macs into our purchase options, and I have long wanted one, and will probably end up with one as a testing platform, but right now I am leaning towards thinking I would keep the SP3 as my main computer even if a new MBP were provided to me...
