The feel article is very good. What it says is get the feel by gently letting a ball hit the passive racket. That is great. His forehand analysis is great too.
Ultimately, look for concrete achievements, like which pro he has coached to success. Also, find out if a pro in the Australian Open now is thinking about feel on every shot.
It is easy to lecture to beginners about feel, but every one eventually develops it. It comes by hitting many balls. If someone is selling you a shortcut to it, don't buy it. There are many things which put together give the sensation of feel.