ATP Written and Practical - straight forward
I strongly recommend Sheppard Air. I took 2 full days to study and completed their recommended study method...96%.
For the practical, there are some great "all in one schools," like in Pheonix (forget the name). However, I elected to train locally (Hawaii). It is pretty easy to get some decent gouge on the local examiners...most are no issue at all. But, it is nice to verify you don't get someone who is unreasonable.
For the training, reference the PTS (Practical Test Standards) on the FAA website. It is very straight forward and the examiner will just go thru this. The flying and the oral are very straight forward.
The oral will primarily ask you about the plane you are flying for your checkride.
I flew 3 training flights (about 1.4 each) and was over prepared for the flying part.