Yes, you do go over and exclusivly instruct in the Senecas. This is the plane that all the ASA candidates fly before they go to the SAAB 2000 simulator. It is a great deal.
That early senority number is cool, but if you plan on heading out of there after several years to go to a major, I would imagine that having the PIC time as an instructor would get you on your way quicker. It doesnt really matter on seniority if your gonna bail, but you never know what will happen. I wouldnt shell out 25k for the program in the first place!!
Flight Safety is an excellent school (I am almost done as a student and plan on instructing if they will hire me). It does have its ups and downs, but what place doesnt. All in all the people here are really cool and professional. There is no doubt that instructors here get HIRED!!! I think we will be losing about 20 in the next month or so. They will go to ACA, ConEx, Mesaba, ASA, and some others. Funny thing that I have not seen one instructor from here go to COMAIR. At least since I have been here.
The student base is good for instructing, you get good multi time, benifits, and the majority of the students are professionally oriented.
We are getting about 20(?) new Seminoles in the next 4-5 months as well. I think the first 6 will come in October. The Piper plant is on the other end of the field!
I guess only you can make the choice on which route to take, and either way you go Flight Safety is a great place to be.
Good Luck at whatever you decide.