I have several S3's that range from B1-B6 and they all have their issues. All of my S3's have never shown Best Share, my B6-S3's do not show the correct fan speed, also all of them have given ASIC errors at some point (mostly when an overclock is attempted).
My S3's show best share but only with certain pools. My S1's seem to show best share everywhere. Would really like to see this fixed.