I've recently taken delivery, and installed the following:

12 x T17+ 58T
24 x S17e 60T

These were all installed 1 week ago, and much to my surprise - all 36 units are working perfectly so far (they've been running 7 days). I was expecting at least a few to be DOA or drop hashboards within a few hours. Of course I realise that they can still fail, but anyone that understands the 'bathtub curve' will know that if a new piece of equipment is going to fail, it is most likely to do so very shortly after powering up (e.g. within a few hours).

It is of course early days, but it's a good sign that perhaps they have made improvements with the manufacturing / soldering process? These units are all from the Shenzhen factory.

It would be interesting to hear from some S19 owners about reliability so far, DOA units etc?