Finally, my new bass (MIM active P-bass special) has arrived, and decided to put on some flatwounds to see why so many people seem to like them. After some playing around with sound settings, all I can say is that I'm really really impressed, the sound is just great, couldn't imagine strings would make such a difference. Their "bad" part is the tension, am slowly adjusting the truss rod, little by little over the days until I get it just right. They're also far more tiering than roundwounds to play, due to the tension. Just my opinion.