Glad to hear that you are back with us. I don't use one myself, as I don't do enough to warrant it, but several of our apprentices have them, and they are rapt in them, except when someone goes behind them and passes wind/gas, or they do it themselves.
We work mainly on Duragal material, and that is where it shines, no fumes or vapours in the mask area. I think these were about $800-900 each, the boss bought them and they paid him back over a few months.
HTH
Kryn
To grow old is mandatory, growing up is optional.