I've had 2 S19 95's and 4 T19's in service since February.  Haven't broken one yet but they can be touchy like all the rest.  I think the larger fans for the PS will help when compared to the 17 series.  They are very sensitive to network or power disruptions but a reboot has fixed them every time so far.  All miners are a pain in the ass at times, but so far these seem slightly better then the 17's.  Nothing beats my S11's though...never repaired and still chugging along after 2.5 years.