The hubs are really good. I have the 500 hubs on my daily commute bike. 4 years of riding every day, usually in rain. The hubs are so smooth.
But . . . anyone know if the bearings are available? Or have experience re-greasing them? Someday, mine will need it.
Standard 6001 cartridges. They can and should be regreased proactively. Remove the dustcaps, carefully crack the rubber seal with a tiny screwdriver, flush with a good degreaser (nothing water based), let them dry out for a day, and then repack with grease.
Your biggest problem will be trying to remove the alu dustcaps. Sometime in the past I was gifted a bucket of these hubs, and even though they were new, I found it impossible to remove several of the caps non-destructively. This can only get worse with time, water and corrosion.
You should marinate your dustcaps with penetrating oil for a day, and make an effort to remove yours soon.