I got the Razr M over the Galaxy S III. It is a very good phone, but I've had rooted smartphones since the original Droid and it feels really strange running stock. The ability to root easily may yet take me to the G III. Maybe somebody will be able to root the M. I really don't care so much about custom ROM stuff, but frankly just being able to "disable" the bloatware crap does not cut it. They still show up in the app space and cause clutter. I also got real used to LBE Privacy Guard which could deny permissions some apps felt they neded. There is probably something similar for stock phones, but sadly it is not LBE.
Overall the M is a pretty awesome phone. I knocks the socks off the Bionic I had previously. It has a much better screen, actually I wonder where the folks who complain about the poor screen are coming from
. The camera is a LOT better than the Bionic too. I like the Gorilla Glass/kevlar/nano coatings combo too. Moto phones are usually built pretty well.
The M I have shows pretty low signal bars, but the dBm signal is about the same as the Bionic. Where I am it is still a 3G world. Verizon has been telling us 4G will be next month for several months now. If I actually live long enough to see 4G, it will be interesting to see if the signal improves. Contrary to claims, the 3G here went to pot in a big way when their network went to 4G. I know that is not supposed to happen, but that is what transpired. Anyway I'm curious to see what happens to service wheen 4G shows up. Phone call quality is better with the M than the Bionic too.
The M seems to have the best GPS of any of the smartphones I have had too.
While it does not have the same performance capabilities of the G III, it seems to be a lot more capable of doing more things than I will never need to do, and I suppose that is true for a lot of people.