the durability is awesome, can't tell how many hours, but best strings i've ever tried ( and i've tested a lot of brands), i´ll keep looking for new things though
My setup:
Racquets:Head Flexpoint Prestige, yes the old one, i haven't found a better one, or better said one that suits my game better than this one, it's just phenomenal.
Tension: 25 kg on clay, 24 kg on "grass"
string pattern: 18x20
weight: 332 gr
Strings: Luxilun BB (16)
Over Grip: HEAD Agassi Pro blue
Player:
Height: 1,88 m
Weight: 80-80,5 kg
Forehand: eastern grip
Backhand: 2 handed backhand
I play 80% of the time on "grass", so i´m an aggressive player on my game, i go for the point, and i don't generate tons of spin on my strokes, that's one of the reason i don't break a lot (using the BB strings)
75%-80% from the baseline
25%-20% at the net
that being said, all that things above work for me, but you guys have to understand that every player is different and therefore will need a different setup

Never underestimate the pain of a person, because in all honesty, everyone is struggling. Some people are just better at hiding it than others.