Guess What! I emailed Laura Calder via her blog. I got an automated response
back politely telling me she was sorry but could not answer all questions to her...but wishes she could. The email included questions most folks ask with answers...all of which had nothing to do with the Mac knife she uses on the show.
However, this morning in my email box there was another email from her and it was her personal answer to me. Here it is, copy and pasted in here. What a nice lady she is.
"Dear Karen,
I used MAC knives on the show, yes. They stay quite sharp, with good care, but in my experience they are quite fragile and don't last. I would suggest you look into something German made such as Henkel. There are other brands, too, but names aren't coming to mind just at the moment.
Hope this helps, and happy cooking!
Sincerly,
Laura"