Have a parachute as the bell didn’t fit me.
You can make it cooler on long climbs by popping the cheek pads out. Which must be pretty much equivalent to removing the bell chin bar in terms of ventilation (and safety as of course the chin bar is useless without the pads).
For shorter climbs I just leave the pads in so protected for 100% of the ride. I never feel I’m breathing my own CO2.
That said I still prefer an xc lid for “normal” riding, the met comes out on days where I expect more gnarr.
Just did several uplift days with it as well. It’s nicer to wear than the 661 comp (which I left at home to save van space) as it’s lighter which is easier on my neck. Obviously not quite as burly in a crash, though; might need replacing if I have an unfortunate one.