Have flown the sim on standby's several times and don't see what the fuss is. Even from the co-pilot's seat it is a piece of wee wee. Of course it helps if you have good support for heading changes and so on. Also if flying on the standby instruments from the co-pilot's seat, use ALL of the captains instruments, don't try and split between the standby on his side and your own ASI, VSI, and altimeter. If you are using them from the left seat, it is a very simple handling exercise. If you can't do it, you shouldn't be there.