[Arran]

Brand Z sets perform alright, but there is nothing that spectacular about them technologically. RCA, G.E, and Philco sets from the same era are much better performers if you are comparing two sets with the same, or similar, tube counts. One major fault with many Zeniths is an undersized power transformer, and consequently more transformer failures, something that is not an issue with most Philcos. One thing that brand Z had going for them was the eye appeal, though some of their cabinets are kind of tacky in my opinion.
Regards
Arran