I've played a couple allparts necks and have been pleasantly surprised. They make good stuff. I've even played some Mighty Mite necks that have impressed me, albeit they were doctored up a bit. A lot depends on having a skilled neck and fret guy go over it after you buy it, most of the time an aftermarket Fender type neck needs a fret level/crown/dress, rolled edges if that's your thing, etc... I gotta say though, if I was building a partscaster, my own personal choice would be a Warmoth Pro neck. The AP necks I tried had decent finish but I can't say if they were finished by Allparts themselves or elsewhere down the line. What you could do is get an unfinished neck and do a tru oil finish on it. Can't go wrong there. Good luck on your partscaster venture, post pics as you go along!
"Why do the best things always disappear, like Ophelia?"