I have the top of the line model of 3. It replaced my games laptop and outperforms it.
I use it with a bluetooth mouse and k/b, and a 34 inch monitor.
Its brilliant!
The only down side is if you run it for more than 6 hours at a time, the usb port overheats, and you get interruptions to usb hub you need to plug things in with. Its annoying when your cable internet switches back and forth to wifi because the port fritzes. But I solved this by running a laptop fan on the side, so the airflow goes in the side ventilation holes on that corner.
For travelling, its even more brilliant. More grunt than my previous 7kg laptop has, in just 1kg.
I waited for the 3 version to come out, so I could replace my previous laptop. The 2 doesn't cut it, so dont be tempted.
All the 3 models have a heat problem, but only the top of the line models seem to have the port problem. The middle of the range works fine for another writer I know who only writes and uses the net on it.
If you dont like wifi, you need a usb to Ethernet adapter. You need a micro-hdmi to hdmi adapter to go to a monitor.
The k/b cover for the 3 is very good, and works fine when traveling. It doesn't have an insert key though, hence me using a different one at home.
If you can get a good deal on one, go for it! The 12 inch version might well be better, but the 3 was worth waiting for. imo.