I found NVC super valuable for opening my eyes to new concepts but challenging to implement in real life. When I tried it for the first time the other person got super angry because they thought I was making fun of them by asking about their emotions.
It does take some practice, and best not to overuse it.
The book 'Words That Work In Business" by Ike Lasater is a very good guide to NVC in the business world.
I don't think I've ever formally studied exactly what it is... but I feel like I use this technique somewhat naturally. I'll couch things in terms where I'm stating what I think, but in a non-offensive way where I'm just conveying information.
I find a lot of phrases like "I'm not convinced that..." soften things in just the right way that people get a lot less defensive or aggressive.
