Weapon questions

So two questions. A little context, I’m usually a stealthier player but as I’m new, things still get loud even tho it wasn’t my intention. I use mostly ASR’s, DMR’s and snipers. I wanna get people opinions on LMG’s(how they use them, how they handle, if they’re overall liked) and secondly, is the Koblin as good as the YouTubers make it out to be?? I know a good amount of them have degrees in hyperbole so I know you can’t always take their word for it.