I went to ATP and had a good experience. I had a good instructor and the airplanes were in good condition, especially the new Seminoles. I was offered to instruct with them but decided to instruct at my local FBO since it was closer to my house and I knew the people there.
If you decide to go to ATP you make of it what you will. If you study hard and are motivated it will be good. But don't think that ATP will land you a regional job anymore than any other flight school. The only advantage they offer is name recognition and multi flight time. It is nice ALREADY having the minimum multi PIC time that most airlines are looking for. And what others have said is quite true, you will save money at a local school.
So do I recommend? Sure. Just know all the facts and what you are getting in to.