I did my ATP-ME in our flight school's Seneca in 2008 and have trained 3 people for their ME ATP in our Seneca so far, all passed on the first attempt. I have a one page Seneca checklist with a maneuvers procedures/engine shutdown-restart on the back side and a condensed ATP PTS in the "Download" tab on my website. I also have an Aircraft Systems PowerPoint on the Seneca I on the "Multi-Engine" tab on my site. If you find a flight school with a Seneca I, download the files, they'll make your training go a lot smoother. If you haven't taken your ATP written yet, go with Sheppard Air!