I don't know about anyone else, but one saying what they think is in no way obtuse to me, so no problem.
My criticisms are shared by others who I showed the link to before forming my own and some of them are esteemed glass book authors themselves, who will gladly share information for free, rather than only try to sell it to you. If I was unfair in any way it was unintentional, but playing it safe and watching out for internet scams is much more important to me than some stranger's website.
Also; no need to agree about disagreeing either, since I do not disagree with your opinion. I just have my own extra ideas and thoughts added to the same opinion is all.