From my observations:
Phil hubs are sturdy and easy to service. The Field Serviceable Axle makes it easy to open up the hub, and the modular design makes it easy to swap endcaps and change the axle length. The sealed bearings are easy to replace.
But, Phil hubs do not have any type of outer seal to protect those sealed bearings; they're exposed. Plus, Phil seems to have problems with its cassette freehubs (Phil freewheel hubs are bulletproof).
I bought my Riv Road Standard used, and it had Phil hubs (rear freewheel) laced to a set of CR-18s with almost no brake track left. I re-laced the Phil hubs to a set of 650b Synergy rims; I used the offset rear to make a nearly dishless wheel.
However, I only put ~1000 miles on those wheels before I built a new 650b PL23 set with a Shimano dynamo front hub and a Velo Orange Gran Cru Touring rear cassette hub.
I like that the Gran Cru hub has completely tool-free disassembly, and its sealed bearings are hidden behind end caps that protect them a little bit.