I have had amazing good luck with my s17 pros. I run 17 and all have every board. We did replace 1 psu. As far as I know no one has been as lucky as me with s17pro gear.
my t17e suck I only have 2
my t17+ suck I only have 1
my 3 t17 are good.
All my Bitmain gear has been very good so far. I don't know if it's pure luck or perhaps something to do with batches / climate here / my setup etc.
I'm running:
24 x S17e 60TH (running for 5 months)
6 x T17+ 58TH (running for 12 months)
12 x T17+ 58TH (running for 6 months)
21 x S19 95TH (running for 3 months)
2 x S17+ 70 TH (running for 8 months)
1 x S17 67 TH (running for 8 months)
I've only had 2 x units fail - both S17+ 70TH which lost 1 hash board each within a few hours of being turned on from new. They were sent back to Bitmain who replaced them with new units in a matter of days.
I've had no problems with any other units apart from the oldest T17+ which have a couple fans not working on the PSU's - but doesn't seem to affect operation (they are in a room with very good airflow).