Jag skrev min recension på engelska, ber om ursäkt för att jag inte orkar översätta den. :)
Compared and read reviews for ages before I decided to buy this camera. Amongst others, the only true competition was the A6000 mostly for its bigger sensor, but for me, it lost in portability, cost and size with quality lenses.
The RX100M3 does very much and does it well. Actually, at times there are too many options, but if you're a novice, setting it to auto will save the day. Should you go for more flexibility, the functions are there to give you even greater results. The ability to change many settings via the function menu is a blessing, as the camera doesn't have space for many buttons, and they are small. Coming from a digital SLR, I find myself looking in the menus for some settings, as I'm out of easily accessible buttons/places for them. This does make the camera a bit frustrating to use at times. Luckily, where you leave the menu is where you enter it again. Dedicated function wheel is perfect, switching between A and S mode, retainging the settings for each, getting the shooting type you want quickly. Three custom settings are good to have, but not so easy to remember which is which for truly quick access. Versatility is good though.
You also have the selfie screen and the pop-up viewfinder. Impressively enough, I haven't needed the viewfinder even in the harshest sunlight, as the screen is very good indeed, but it's a good thing to have in any case.
At times, the chroma noise can be very high already at modest ISO, but then it can produce awesome results at high ISO, not sure why. Flash is bounceable, a must I think. Files are huge, 10-16MB.
Battery life is not that good, strange that the viewfinder uses more power than the rear screen, though the screen is always active, even if you "turn it off" via a button. This hasn't been fixed and probably never will be. Neither will the resetting of file numbering for movie clips after formatting the card (for stills, numbering is retained).
The play apps are cumbersome to download, and not so well implemented, but it's ok. A definite must is the smart remote control, works great for those special selfies from a distance. NFC can be a bit slow to connect, but starts the app you want on both phone and camera.
Charging via USB isn't that good, as it's very time consuming and the camera can't be used, but using a higher spec Sony Xperia charger shortens that time some.
All in all, I'm very happy with my purchase, and feel that I got good value for my money, loving it more every day.