Jan, Joel is in Houston Texas. His father had a small church that he started in a feed store that struggled for a long time. My Uncle tells me that Joel's father's ministry (John Osteen) started growing in the mid-1970s when witnesses were figuring out that 1975 was a hoax. I don't know if there is a direct relationship between witnesses leaving and joining John Osteen's ministry, but, my Uncle seemed to think so, but I haven't any proof. Probably coincidental.
I've listened to his sermons on Sirius XM and he is very positive. I have enjoyed how he brings out that when the Israelites first left Egypt they still had a "slaves mentality", they thought of themselves as victims. He claims the reason why they were instructed to walk around Jericho and not say a word is that they would have started complaining and talking negatively that this was a waste of time. (lol)
He admonishes strongly against negative thinking, talk, and actions and encourages people not to go through life feeling they are victims. It's your life, you have the authority to be positive and God will help you. In many ways, his message of hope is the opposite of WTBTS where they teach you dependence upon the Governing Body.
I haven't given him or donated any money to his concern as his sermons are on Sirius XM and to my knowledge, you can download his sermons online at his website for free.
If you listen to enough of his sermons, I did get tired of him telling over again of his successful business adventures with his radio station and then getting the basketball stadium of the Houston Rockets, Compaq Center, from the city of Houston and then his "struggle" to get a loan for a $100 million renovation. But, I get tired of "people's" stories pretty quickly after hearing them the second time.
IMHO, Joel Osteen is an excellent speaker with not one "and, ugh", no guilt trips, or begging during his sermon for money. I'm sure as mentioned before, there are others who are better or more liked. His message is encouraging but not a "deep thoughts" kind of message. Later when you are thinking about it you can figure out how to apply it in your life.