With Microsoft's quest to have a tablet replace a laptop, they've churned out the Surface Pro 3. I purchased this device with the intent of using it in engineering classes as something I can carry around and work math on. First Impression - very thin, light, and sturdy feeling. Silver coating seems good, but the test of time will tell, as the titanuim black on the Surface Pro 2 came off after a while. Buttons are placed well, ports not in funky places or anything; it seems pretty good. Friction lock is a very nice addition to the surface. The Screen - high resolution and responsive. Both key in a laptop/tablet combo. The touch home button is a nice touch and responds to the pen (which I'll get to in a minute). Edge sensitivity for the pen is awesome. It writes right up to the edge without big problems. Pen - Last pen was horrible, and this pen is pretty awesome. Two button design is helpful, as one button is eraser and one is select/right click. The top button opens one note even when in sleep mode for quick note taking. Pretty fancy features. Cursor comes up about an inch to an inch and a half above the screen. Tracks the pen pretty well, no lagging when writing. Overall, a huge improvement on the other. NOTE: this runs on bluetooth as wellType Cover - This is probably the biggest thing that people have problems with, and they're not without reason. The cover is improved from the prior generation, with more comfortable typing, another fold and additional magnets to angle it when on a desk or lap, and a larger mousepad (a plus, but I usually just use the pen). It is not ideal for the lap. Period. This is simply because the joint between the keyboard and the tablet is flexible. That's it. If the joint was like the friction hinge, then it'd work perfect for lap use. Nonetheless, it is manageable in the lap, comfortable enough, but better on a desk. I'll leave it at manageable overall. Speed - the SSD is a big plus. Because of the thinness of the tablet and battery life needed, the SSD was needed. Runs smooth, start up time is as expected from an SSD. No problems here. Installed Software - This is nice because almost no 3rd party software is installed, unlike if it was made by Lenovo, HP, Dell, etc. One note comes standard, and is pretty chock full of features. Nice interface and overall, pretty good. Battery life - I haven't had too much time to play with it, but the 9 hours claimed by Microsoft won't hold up, as manufacturer use times (almost) never do. I played with it all afternoon on 50% and it went down to 20% over a period of about 3 hours or so. Not bad, but I'll bet it will fall just short of 9 hours.Expandability -Internally, it's so packed that it's not feasible to do it. Period. Externally however, you could just get a usb 3.0 hub and run whatever you want off of that. Also, the mini-SD card slot is helpful as well, as every little bit helps. Performance - I got the i5, 256gb, 8gb RAM version. It's pretty speedy for the package it comes in (about one of those cheap 70 page spiral notebooks, albeit a little heavier). Good response times, just look up some of the benchmark tests on google and that'll explain it in detail. Overall, it's up to par with a regular laptop. Overall, this is a step closer in the right direction, but not there by any means. Computers started being sold as unfinished so feedback could make them better. This is no different. Feedback will improve each subsequent generation. I'd suggest a friction lock on the keyboard to prop it up like a regular laptop. Not a bad buy at this point, I'd suggest it.