Basic IF flying
Using the twinstar for your basic trainning is just a very good way to store up problems for the future and should be avoided.
Most of you will go on to fly airliners with glass cockpits and spend most of your time following the magenta line however what happens when the FMC quits?
You will find that in this situation the aircraft will have to be reverted to glass version of the clockwork cockpit. If you do not have the basic skills to fly the aircraft in this condition you simply should not be sitting in the seat.
A friend of mine who is a Captain for a charter airline had an FMC failure and the newish FO instantly made a "pan pan pan" call to ATC because of the failure of in the FO's words the "total navigation failure" (the Captain contnued the SID using the "clockwork").
This abismal performance is indicative of the very low basic skill levels that using a glass cockpit gives the student, to put this in simple terms if you cant fly the aircraft using the "clockwork" you should not be flying the "glass".
As to the exam pass rate it would seem that a lower standard of student can get a pass with the glass but have you considered that this fact may be lulling you into a much more expencive hole when due to lack of basic IF flying skills you fail a jet type rating.