Need Info about HiFi Supply LUX 91 300B mono amp

Hello fellow tube amplifier lovers ~

Has anyone experience with DIY HiFi Supply LUX 91 Max mono 300B amplifiers with the Silk Transformers?

I have picked up posts of buyers that have had significant problems with this amplifier necessitating them sending back the amp to Hong Kong!!! But I cannot tell if these posters are an anomaly... or if this is indeed a significant quality control issue with this apparently well-designed 300B amplifier.

Here is a link to their website: http://diyhifisupply.com/catalog/110

So if anyone in our community has had experience with this amp... good, bad, and everything in between, can you please share your experiences with me?

Thanks in advance for your help.

With Warmest Regards ~ Richard