Excellent motors! Used them in my primo 3 build, just cruising slow i can get up to 7mins+ of flight time and really ripping on it with good batteries im still in the 4-6min flight time(2s 525mah hv). Durability is good as i have crashed hard many times and recently bent one motor shaft (ever so slightly somehow) in one of many mishaps.
A perfect match for the primo 3.
Truly amazing in power and good on the battery love these motors highly recomend!!