Yeah I reckon hadley/king hubs are a lot of hassle, especially for their cost. Compared to simpler designs, they flat out just need more maintenance, more looking after, and cost more (initially as well as to maintain). Preload adjustable cartridge bearings are a copout IMO; and as hadley and king both clearly prove, it's nothing but a hassle that leads to them coming loose. If you want to be a showpony then by all means, but you're gonna have to put in some time from the get go to make sure they stay running smooth.
Once they're bedded in and setup right, they'll go for a while (and the fast engagement is novel for a while) - but seriously, I just want to ride my bike. If you're that kinda guy, then get the hope pro II's. You can bolt them up and go, and go, and go... and as a bonus, they are WAY cheaper, WAY lighter, and come in every configuration under the sun.