Yeah, I don't think a brand new dryer should make a clanging noise. Probably defective.

I have LG appliances, but I don't know how old they are. They came with my house. There have been some times when the clothes aren't completely dry with the sensor feature, but overall I'd say it works pretty well. If I'm not going to put them away right away, which let's be honest my dryer gets used as a storage place, I'll usually just check and see and if they're still a little damp. If so, I'll run another cycle which finishes pretty quickly because they were almost done.