I’ve had a Bernolin 442 alto for a couple of months. It does tend to suffer from condensation rather more than my wooden altos but then I quite often find myself wandering around the house with the head-joint in my pocket just waiting for me to have a blow!
I have never used mine for consort work.
I echo Richard’s comments about about some of the high notes. I find the high G is sharp and even covering both holes 7 doesn’t bring it down as much as I would like. I’m currently practising the Frans Bruggen arrangement of the gavotte from Bach’s second violin partita. It’s an absolutely beautiful piece but there are quite a few passages with high D, E flat, E, F, G and G sharp (as well as one F sharp which requires the use of the thigh!) an they are fairly difficult to get to sound consistently.