Loved the concept, found it fell over for real-sized things on even the most powerful machines, had to switch to Structurizr to do our C4 modeling: https://structurizr.com/
Was very disappointed, bet I'd get more devs to model architecture with this tool. If it's relaunching because perf problems were resolved, will look forward to try it again.
Depending on scope of people's needs, either highly recommended or, try it first.
Hats off to Victor for great support back then, and I see the docs are a reflection of that, like this section on embedding into popular tools:
https://docs.icepanel.io/features/sharing#embedding-share-li...
TL;DR: Helpful team, thoughtful UI, thoughtful docs, a product capability (c4 modeling) very worth understanding and using.