Buddy of mine at CHQ says they took the last midatlantic 170 already and are behind on training for it. From what I understand, the 170 is what they're trying to fill right now so you should be made in the shade. If you're prior 121, it's a pretty safe bet that you won't be doing the sim as long as your current. If you're really worried, hit a Frasca 142 and just practice putzing around with some turns, climbs, and descents ILS and a hold. It is sensitive if you try to fly it too much, just let it do it's thing. I know people that crashed on the ILS at GS intercept because they pulled the power out and tried to descend. I just dropped the gear and it flew fine. Profile's easy so you won't have any trouble with that. Just remember, treat her like a lady and she'll take you home everytime. Good luck, they're nice people there.