I have a friend who belongs to a Witness Lee church and I occasionally read the Recovery Version of the Bible, just to get a different perspective on the text from my own. All I can say from my own personal experience is that they seem like nice people and good Christians.
Yes, I'm sure they are friendly and well intentioned. From my brief impression though, there are several that are like SBC's that want to hit you over the head with their religion and scream fire and brimstone at you.
I'm wondering if there is any good Orthodox apologetic material out there that exposes their flaws (more regarding theology, like the Trinity).