I faintly remember about the though process of italics, but I don't remember it now. They don't look uncomfortable to me, anyway.
It's a modern yet period correct version of these older fonts, with proper character set support and love for details. It's so perfect for me, it becomes invisible, or as the Berkeley's page says: "It's boring. It's good"*.
Or as I mailed the creator after using it a couple of weeks: "It's so perfect that it transported all my computers to 70s, in a good way".
*: When I was writing this comment, I wondered whether I really set my browser's monospace font to Berkeley. It becomes that transparent after a while.
You can start with $75 package and work your way up if you feel like you need them.