Good reasonably quiet motors for 400-600 size quads.
I am running 4 of these on a Diatone Whitesheep (Disco clone, sorry TBS), and have had them on there for almost a year now. They have performed flawlessly the whole time and are still going strong. Can't comment on how well they will take abuse, since this particular quad have never crashed, despite having well over 100 flights on it now (I am even still running the first 4 props I bought for this quad... a year later!), but they seem perfectly solid, and I'm sure the arms on the quad would break long before the motors would. Most quads these would end up on are gonna be AP quads like mine, rather than arco fliers anyway, especially with the fairly low KV. I get about 18 mins of flight time on them, AUW 1.82kg, 5000MAH 3s.