I totally agree. I have CS6s and recently pruchased their SS2 Sub with the CS6 passive crossover. I had a small hum problem with the sub, not necessarily Thiels problem, it could have been a grounding issue with my system. here was no question from Shari about what needed to be tried and she IMMEDIATELY sent out a new sub amp. I installed it (it was easy) and this "solved" my problem. I will remain a devoted Thiel enthusiast not only for the musical enjoyment they bring to me but also to support a fine company that cares about its customers and takes action to validate that support.