Hi Kerry, I used the sample this morning.
First I will set the scene as you requested. I'm not a menthol head.
The only cold soaps I own are Proraso green and a Sterling sample of Margaritas in the Arctic which I cannot remember using. However I do have the Proraso preshave which is akin to putting Vicks vapour rub on your face. I regularly use the Proraso green soap and preshave for cold water shaves when away with work for an early morning kick up the arse. Also it helps prepare for the lack of hot water usually
Now about your Denali.
It's a great soap, but that's expected of P&B! The lather is great, post shave feel, slickness etc all present. I cannot imagine anyone having a problem with its performance.
The scent is enjoyable. Being a menthol type soap it wasn't going to be one that keeps you returning to the bathroom to have a sniff, I mean who goes back to smell Proraso? It was however pleasant and if you were to tweak or retain I wouldn't lose sleep.
I used the soap without preshave and with hot water and had a great two pass shave (P&B - Never in doubt). It was cold, and the post shave cold water splash was refreshing. I will give it more shaves and feedback but early indications are good.
If pushed I would say colder would be preferable. However I will give it a go as a cold water shave and maybe a preshave one as well seeing as it was a nice sized sample.
One thought though, if the menthol heads and I want it too cold for the majority, how about a limited edition that gives 'em brain freeze