Well, I got one a week or so ago after much agonizing (128gb version, Pro2). It's replaced my laptop as my primary portable work device. Brief pros and cons (highly subjective):
Pros:
1. Extremely lightweight and compact, in laptop mode (i.e. with typecover attached). As a tablet seems decent enough to me, though I am used to holding heavy notebooks/books/journals so your mileage may vary. You may have some problem getting it to settle on your lap, but I usually work on a desk so haven't faced this problem myself (though I have tried to experiment, and it doesn't feel that bad, though I wouldn't recommend it for long periods)
2. The display. Woof! I'm not a professional artist and have a basic grasp of calibration and colour stuff, but the SP2 display for displaying text and images is beautiful. Crisply and clearly rendered and video so far looks decent as well (though that's not my main thing). Though I have to say, sometimes, if you're using older software the fonts can be a bit blurry (though I think this is a OS thing).
3. x86: I can't stress how much of a pro this is. The ability and power to run x86 software without having to resort to 'apps' (urgh how I hate that word) just gives you so much freedom of choice. Again, I don't use Photoshop type stuff, but for R (statistics software), LyX, PDF Xchange (too used to it by now to switch) and even old games, this thing is a beaut. Just don't expect to run Crysis or whatever the newest shooter game craze is. I did get Steam installed and running Crusader Kings 2. It ran pretty smoothly for 15-20 minutes before I realized I needed to be working So its not as if NO newer games are going to run.
4. Battery: more of a 'OK' than a pro, I've been getting around 7 hours on a full charge, which is down from my old system (Thinkpad T420) though of course, given the size of this thing I can't really complain. Can't wait for them to come out with that d*** power cover though.
5. The stylus and OneNote: My gods! OneNote on this thing was a revelation. It's basically almost perfect, the only downside I see is copy pasting from other documents, but I suppose that becomes easier with time. The stylus itself is really awesome (have never used Wacom before) and has replaced the touchpad for me.
6. microSDXC and USB3: I got the 128GB version and was a bit worried about space. The microSDXC is great for carting around music (don't really watch all that many movies, but you could use it for that too) and the USB3 port allows you to hook up well...pretty much anything.
7. Type Cover 2: I got this instead of the touch cover and don't regret spending the little extra at all. I type somewhat extensively on it (though OneNote and the stylus are slowly replacing my old habit of typed notes, so its just for longer papers) and it feels pretty good. Its more cramped than a normal laptop keyboard obviously, so you may need some time to get used to it.
Cons:
1. Windows 8: Urgh. I guess I'm old? I really don't see the point of this thing. Thankfully, it being x86, a few minutes of googling allowed me to install ClassicShell and have a more natural (i.e. the way things used to be in the good ole days ) feel to things. Maybe come the summer I'll have more time to see whether Windows 8 does not suck, but for now, classicshell allows me to pretend that this thing is windows 7. Again, full x86 is a lifesaver here, because you never EVER have to go to that d*** windows store again.
[This is purely a subjective opinion of mine so please don't flame me or attempt to convince me of how wrong I am about this. I probably am wrong and I accept I haven't really tried to get into windows 8, but I am incredibly set in my ways and it just 'feels' weird to have those tile things ]
2. Price: This wasn't really a problem for me as I sold off my old laptop and got a student discount on the SP2, but the price can be a downer for quite a few people (and even with the discount, the tag was pretty hefty). If you think of this as laptop replacement than it seems more bearable though.
However, what I find really annoying is the inability to go with a 128HDD/8GB RAM combo. Seriously Microsoft, whats up with that? I don't need 256GB but would really have loved 8GB. 4GB is...fine, but things do get stretched sometimes. The jump from the 128 to the 256 model is pretty steep as well (300 USD) so it really does kind of suck not to have a midway 128/8 GB option. I suppose there are complicated engineering reasons or something. Or maybe its just Microsoft.
3. Lack of upgradibility: Not sure if everyone sees it this way, but for me, not being to add or replace stuff is a major pain. Like the RAM stuff above, would have been nice if we had the option (either on purchase or DIY) to upgrade some components. Again, not a hardware expert, so there may be legitimate reasons for this. I just think it kind of sucks.
4. The touchpad: Yeah, its a touchpad. It has a left-click and a right-click which make a nice, old fashioned 'click' sound when you click them. I have noticed that a new update this week has made it somewhat better. It's...there? You can use it if you have to? This is more an 'OK' than a con, for me at least, but I think some people want more out of their touchpad. Don't expect to play any mouse intensive games with it though.
Overall, a definite buy if you have the money. 128GB seems pretty good storage wise (I got around 90GB once I cleaned everything up and you can get the restore partition to use once you back it up to a USB drive which is another 6 or 7 GB).