I have had 2 Fabuleux out of my AHS approved TB mare who also passed the AHS MPT.
Both were very pretty, but the filly is superbly pretty. But this mare always gives her type to her foals (dam is pretty). Both have very good canters, shorter backs, very good walks. Both are very sensible and suitable for amateur riders to have fun on because they are uncomplicated.
The colt has a better trot for dressage, but not a lot of knee. He is 5 this year and although bought by a hunter rider, he has been in dressage training for the past 2 years. The dressage trainer LOVES him and said that at a well know Clinician from Germany tried to buy him and export him to Germany.
The filly was sold to a hunter home and they have just started taking her to shows as a 4 year old. They also are totally in love with her looks, attitude, movement, JUMP, and rideability. They say she will be a hack winner and that her jump is perfect. She is shorter (15.3, while her full brother is taller, 16.2). The dam was 16.0 h.
IMHO, you do need a mare that has a pretty head and passes it along. I have seen some Fabuleux with less than attractive heads. Otherwise I agree with the assessments of the others posting above.