If you can find a copy, Steimatsky published the complete works of Josephus in paperback in the 1980s or 90s.
I have a copy. The English is modern and readable and there are great indices and footnotes too.
You might want to try Hebrew Book Gallery in Jerusalem. I have found all kinds of hard to find things there in both Hebrew and English.
Here’s their link:
https://bookgallery.co.il/content/english/default.asp
I know you are asking for personal experience but just quickly searching Amazon, they have a newly published complete works which says all the old language of the Whitson translation has been updated to modern English. It also has bumped the type size and leading up for an easier read.
If you look in the reviews there are several good photos from purchasers showing the text quality and style of prose.
Here’s a link for that too:
https://www.amazon.com/New-Complete-Works-Josephus/dp/0825429242/ref=mp_s_a_1_2?crid=ISV7EHOI9BNH&keywords=The+New+Complete+Works+of+Josephus&qid=1669837565&sprefix=the+new+complete+works+of+josephus%2Caps%2C786&sr=8-2