I fellowshipped at the AOG in Sydney for a year and a half, and I found it a bit of a disaster. If I could use an analogy, the behaviour I experienced from the people that had been members for years was akin to what you would expect from a new born that had just crossed the Red Sea. They conducted a formalised church service which I find difficult to believe is beneficial to anyone unless the participants exude godly character in their lives generally. There wasn't much of that evident in that fellowship in my experience. The worship services there were certainly upbeat, but that didn't seem to be helping the vast majority of participants to mature spiritually ie develop godly character. It was very sad to see. For my own safety sake and spiritual welfare, I left the AOG.
My experience in the AG in America is that no two churches are alike. They each have their own culture based on the people and the leadership of that church. A bad experience in one AG church would never equate to a judgment on AG churches elsewhere.
The trend is moving toward the modernization of their buildings being just meeting places and all the traditional decorations inherited from a long history of churches in America are fading away. The majority of AG churches are dropping the name from their signage and literature.
It is common for people to be involved in an AG church for years and not realize it was an AG church. They would tell you it was nondenominational. Because it is. Which is why they can't tell it was associate with the AG.
Most non denominational churches of size start to organize with other non denominational organizations so that they can contribute to world evangelism with a group that they can verify is teaching truth and not error and who are actually getting the job done in planting non denominational churches that are reaching the communities where they are planted. When this happens they have in effect done the same thing that the AG is doing.
So of all the churches out there to explore the AG offers that non denominational feel and culture while also providing a huge worldwide array of open doors of opportunities for those who feel called to fulltime ministry.
We can stop reinventing the wheel with one individual church trying to do things that someone else is already doing a great job of and join them in those successful efforts and get the world evangelized in our lifetime.