These have been on the go for six years and have held up exceedingly well. Used with Middleburn’s Uno 32t singlespeed chainring with built-in spider (you can also easily swap in/out twin- or triple-ring spiders) they’re light (391g for the arms) and stiff.
They’re showing very minor cosmetic scuffing, considering their use (six years, 9,360 miles!). The chainring has been replaced after the teeth hooked, but the original hardcoat version took five years of abuse.
Although the cranks are great, opt for the square taper version over the ISIS for greater bottom bracket reliability and life. Loctite on the lock ring is essential to prevent creaking.