This wont be much of a review. I tried one this morning in my66 Super Speed. All the typical beard prep was in play. Today was a Proraso day, pre/post and soap. I do a standard 3 pass WTG/XTG/ATG shave, but I didnt even get through half of the first pass. Do be fair, I favor Astra SP& Gillette 7 oclock(yellows). Anyway, the blade tugged WTG for the first 3 movements on my right cheek.
I went with it and soldiered on. By the time I got through with my face& chin, it was noticably rough and slightly irritated. I didnt chance it on my neck because typically it is very sensitive.
I grabbed another razor that was loaded with a 3 shave old Gillette yellow and the difference was huge. At three shaves old the blade was sharper than the Supermax.
I know this is a serious YMMV post and to be fair I compare the Supermax Titaniums with Derby and Bluebirds. I know a lot of folks love those blades and in the end may love this one too.
For the record, I despise the Supermax Titaniums, Derbys and Bluebirds. I would rather shave with an open flame than ever use one of the three mentioned blades again. There wasnt much posted on these blades, thus I felt the need to ramble on about them.