It's better than you think.
This is one of those situations where it's hard to compare apples to apples. I don't know how far Amazon will let me take this, but while most cameras sell for less in the USA than in shops 500 feet from the factory they were made in, the EOS M3 is an exception. So I'll just say that at the current US prices, the Sony cameras are a better value (although the M3 does take better pictures than the RX100 series because the M3 has a full APS sensor.)Now, at the right price, the EOS M3 is outstanding. It does not have the dynamic range of the Sonys and it's a bit noiser in low light. But when it comes to capturing fine detail and not regretting that you left your SLR at home, the M3 is great. With the APS sensor, it's essentially a tiny APS SLR anyway.Two of the four lenses are outstanding. The 22mm f/2 is excellent and and the 11-22 f/4-5.6 is terrific and includes image stabilization. The 11-22 is the one lens in the system that's worth the money even at US prices. The 18-55 and 55-200 lenses are pretty good but probably not a justification for buying an EOS M camera.The focusing speed is much improved over the EOS M and M2 but still too slow for action. OTOH, I have yet to use a mirrorless camera that focuses anywhere near as fast as the cheapest SLR so if you want to shoot sports or race cars, mirrorless will make your life difficult, compared to just using an SLR.The M3 body is very solid and kind of heavy, to be honest. The only part that seems a little delicate is the fold-out-up screen. Unlike the original EOS M, the M3 has knobs or buttons for most things so if you've found the touch screen making it's own adjustments every time you grab the camera, this can now be avoided.Using non-EOS M lenses. Yes, you can use your Canon EF lenses with the beautifully made adapter than Canon sells. And they'll have full AF. Some people think this is great, but focusing is still slower than with the dedicated "M" lenses and honestly, the size/weight difference between most EF lenses and the EOS M body make this kind of a jury rig, in my opinion. There is however, a great alternative. Since the M3 has an excellent focus peaking display, you can use just about any lens that will fit on the camera ($10 adapters on eBay) and focus faster and just as accurately the old fashioned way, by hand.Lack of a viewfinder. The M3 is small camera. Sony found a way to pack a viewfinder into a camera that you first have to pop up to get access to. There's no good answer because (a) there's no place to put a viewfinder on the M3 except in the shoe and (b) good viewfinders are really expensive and the same people who insist on having one won't pay for it. Canon knows that adding an additional $200 to this camera is out of the question so there is an accessory electronic finder available. I got a kit overseas with all the pieces and I have to say while there is nothing wrong with the "EVF" I rarely use it. So maybe I didn't need a viewfinder after all, although I suppose Canon might make a super EOS M at some point, for people willing to pay Fuji prices.Other stuff. The built-in flash works and can be tilted a little. The output is small, but if the idea is to carry as little as possible at least you don't need to bring a separate flash to take photos of people at the dinner table. Selfie-screen and 2-axis level--nice. 18-55 lens--perfectly ok if you stop down but you do yourself a disservice to have just this one average lens. 55-200 lens--Quite good at 200mm; a little less so at 55. Still, it's small, image stabilized and light as a feather. Its not fast, which is why it's light as a feather; can't have it both ways. (55-200 has a plastic mount, no idea why they cut this corner. Shame on you, Canon!)I guess that's it. The video looks good to me. Not as good as my 5D3 but good for the occasional use I put it to. To summarize, on paper, the EOS M3 might not sound so spectacular. People who want the latest innovations, useful or not, will probably want to look elsewhere. Web sites and self-proclaimed "experts" thrive on the newest whiz-bang and there's not much of that here. But the ratio of camera size to image quality on the EOS M3 is really impressive and at the right price it's a very underrated camera.