I like to work fast with CAD software and every delay in UI response is really annoying.
We recently upgraded from NX11 to NX12 and apart from performance problems I am discovering also other issues like:
* Sketching was never the fastest, but now rapid dimension is even slower.
* Artifacts when rotating in graphic window, blue/yellow geometry. Probably caused by new "Split window" / Tabs layout feature. Somehow 3D performance is degraded. Visualisation settings are same as in NX11, worked on same assembly (upgrade to NX12) and only in NX12 I have this issue. In NX11 for this to appear the assembly had to be really big.
* Issues with selecting edges, in big/bigger assemblies, like they are not detected or hidden by geometry in front, i dont recall having this in NX11 so often. Viewing from different angle or zooming in helps.
* Sometimes, fortunately not often, NX freezes for 5-10 sec for no reason.
I understand the need to give some new features in every newer version of software, but sometimes the changes are somewhat strange and of poor "quality".
I found a bit annoying UI change in "assembly load options" where instead of having 2 checkboxes for "Partial Loading" and "Lightweight Representations" now we got a list with 4 combination of both, with list box so small that the option is not fully visible, I get "Partially Load - Lightw".