I've recently started using an OM1n. I've been using a Bessa R2a rf for the past couple of years.
I wouldn't say it's a light camera, but it sits in the hand nicely, though I sometimes miss having a bit of a grip on the rhs.
with a 50/1.4 or 24/2.8 it's very compact indeed
I do use the metering (I also had Michael Spencer cla & convert mine), but in very low light or at night the metering is unusable as the needle disappears in the gloom.
It is a camera that I want to pick up and use just for the pleasure of using it.