(Would probably have bought the soho if it had disk brakes)
According to the mechanic in my most local lbs (they had a fixed belt-driven trek in the window for a while - probably about 5 months or so back - with a hand-written sign on it describing it as 'the thinking man's fixie') the servicing goes along the lines of... "Yup, that's all working. See you in a year or two!". He really, really seemed to like them - even suggested I consider a Soho with a Nexus 8 hub gear.
Is it actually fixed? I had a look at one in LBS a while back, and it seemed to have a freehub. Not just a screw-on freewheel, so you can't replace it with a fixed sprocket (does anyone make a fixed sprocket for belt drives anyway?).
However, they replaced the alfine hub with the nexus, and dumped the disk brakes in favour of roller brakes. Either of which alone would have been enough to spoil the bike for me.
Rollers aren't safe for sustained heavy breaking.
They do get very hot, but I'm not sure whether they actually fade or whether it just ruins the grease.