I run it in 40, 45, 10mm and 38spc. Yes it is flashy. As a shooter I only notice it on extremely overcast days. I do not find it bothersome, in fact I find lead smoke screws me up more than muzzle flash. Not sure about the noise, I certainly don't notice it while shooting.
Overall I have found it to be superior for my needs. Meters great and is consistent from lot to lot.