knows him ALL too well
Sorry, don't know him well at all. I just know him. The extent of my doings with him:
0. I've read a bunch of his divrei torah on the parsha, having found them lying around the shul (they gave them out at Rabbi Berkovits's kollel for a bunch of years).
0. He's a talmid of Rabbi Berkovits.
1. He edited the halacha of a sefer after I edited it for language. I don't think he knew who I was other than reading my halacha-related haaros on various psakim in the sefer.
2. He's a good friend of my boss.
3. I've done a few gift deliveries from him to a mutual friend in the neighborhood. Spoke with him on the phone a grand total of once (the rest of the contact was by email).
In summary, I know him, but not well at all.