I don't have experience with them but what I have heard, when on the hour building program, flying is usually done in evenings and nights. The aircraft are used for other training in day time and hour builders fly after they are finnished up. If you are logging JAR time, only 100 hours can br used since safety pilot time can't be logged according to JAR. If you go for the 200 hour building package, you'll fly 100 hours as P1 and 100 hours as a safety pilot (which can't be logged).