Do yourself a huge favor and complete all or most of the writtens, and know EVERYTHING in the Seminole supplement before you arrive. With emphasis on the engine failure checklists and gear down before landing checklist-you'll be required to memorize these anyway. The pace is reasonable when you have that done. Your first week will be very busy, expect a multi checkride 7-8 days after arrival.
I had the supplement memorized and all the writtens but CFI done when I arrived, and have really enjoyed the program. The first week goes so much better when you have the background knowledge of the aircraft down cold-speeds, checklists, etc. You will have daily quizzes to complete, and a Citation systems video and systems test to complete during this time, so I was still busy. For the oral exams, use the provided oral exam guides and talk to the other students and CFIs about what the examiners ask. My experiences so far are this: advance preparation and study pay huge dividends. You don't get rusty because you are constantly studying!