Australian who's been in the USA almost a decade in 4 different roles, each requiring a new E3 as well as multiple E3 renewals;

I've found that companies are pretty eager once they hear that you only need an E3 visa. Unlike H1B the quota for E3 visas are never hit. Companies view it as a very straightforward and guaranteed process.

Assuming the company files their side of the paperwork in a timely manner, From accepting a role you can be working in the USA within 2 months end to end. The consulate appointments in Syd/Mel are the biggest pain point. It takes some refreshing since they are booked out for months at a time and you need to look for cancellations each day. That's literally the biggest pain point though, everything else is painless.