[georg16nik]

...I've heard that M6 rangefinders have a tendency to "flare" in certain light conditions making them difficult to focus. I came across this criticism again when reading a Net review of the Bessa R2; the reviewer stating he preferred the Bessa to the M6 as the rangefinder was brighter and not prone to the flare exhibited by the M6 in bright light..

The Leica photographer is not supposed to rely on the rangefinder that much, he should be able "see* the shot on his mind, the RF is optional.
If someone complains about Leica RF/VF, even the LTM ones, then he simply need practice.