I interviewed with NUIX in the Summer of 2020 for the Solutions Consultant Role. Overall it was a positive and efficient process - that's all you can really ask for, even if you're not selected for a role. I talked to HR, the Hiring Manager, and did a short presentation on NUIX products for a larger team (4 people) all over the course of 3 weeks.
The important things were that they were very clear and upfront with how the process would work and the duration, and there was no wasted time. A much better experience than other similar roles that I've interviewed for in the past.