As far as chocolate goes, I think Lindt is really good. I love their 85 and 90% dark, both very good, smooth and well worth every bite!
As far as their processes being secret, I'm not really surprised by that. The chocolate biz is competitive. I wouldn't want to give my secrets if I made chocolate that good. I don't think they are trying to hide or cover up anything. Their products are legit, you can taste a huge difference between their product, and a Hershey bar for instance.