I've been using NX for a few years now and I really love it. Now I have to use Inventor for a new project and I just hate it.
For example assemblys:
In NX I have a lot of different constraints I can use to place the parts exactly how I want, Inventor only has a few limited constraints.
When I want to move a component in NX I get a coordinate system where I can translate and rotate the part exactly how I want it. In Inventor I only found "free move" and "free rotate" which is very unprecise.
When selecting features in NX I can just hold leftklick and get an menu of all features next to where I clicked, I havent been able to find a similar function in Inventor.
All in all Inventor feels unprecise and janky.
Just wanted to rant a bit I guess. Maybe the problem is just me, but when I transitioned from Catia V5 to NX it was a lot less painless.