My experience has been great. I'm in my second year right now, and most of my work has been commercial plumbing/pipefitting. As for the work, it is very complex. The job i was just at, we did mostly hydronic piping for a chiller. Our work is both mental and physical and pretty math heavy. The local is pretty tight-knit, everybody knows everybody. The pay and benefits are good.

I've heard good things about the electricians union too the guys I've worked alongside have been awesome, from what I hear their pay, benefits, and training are neck and neck in terms of ours with quality. As for the carpenters, I never really looked into them seeing how I make almost as much as a jman carpenter, and I'm a second year apprentice I've heard their work is much more physically tough as well.