I actually wrote a long post on this very topic last winter, when I forgot my DE (my preferred travel razor) while on a trip to Mexico. If you care to read my account here's the link: http://straightrazorpalace.com/gener...evalution.html

Long story short, I found the Mach to be on the bad side of mediocre. No irritation, just uncomfortable and the shave wasn't particularly close. I found a two bladed Bic to be far superior.