ISIS is fine if you buy the right one, they have done alot of work in the last few years, but you have to put your hand in your pocket.
I swear by SKF BXC600 and the DH equivalent but they are around £80, made from stainless, needle rollers (fantasticly good but expensive) etc, 2 year guarantee, ‘unofficial’ 10 year lifespan, but they also weigh 100g more than a ti one from Crank bros or Control tech. CB have a 5 year warranty but from my research you have to use it a little too much, even tho the customer service is very good.
So in short Pace and SKF stand behind their design for ISIS as very robust, but not cheap.