Update on my thoughts on these.
After my initial review, I used the same blade in the same razor (a Tech) a second time with Palmolive soap. First few passes on the face fine but when moving onto the neck bad news. Never had drag like it, so uncomfortable that for the first time I aborted and grabbed another razor.
Not to be put off I next used this same blade in my WS Classic with Ingram cream (the mildest, most comfortable combo I have) and whilst it gave an OK shave it wasn't that comfortable.
I tried a brand new Trig last night in a Feather Portable and used Palmolive again - good shave. Tonight in the same razor and using ARKO the same thing happened again with massively uncomfortable drag on the neck area. Switched to a Tech and its loaded Tesco IP to finish the shave.
So, these blades seem to only give one good shave for me and that's it.