i bought the first pair for myself on a whim when purchasing a similar pair for a friend.  the are just the right amount of warm. (example temps in fahrenheit) i wear them in my 72 degree office building comfortably and i have worn them in outside at -10 ( -20 with wind chill ) so far.  i thought they may be too warm for inside when i first bought them, that is not normally the case.  they were only too warm on two occasion's, once  at a friends house when they had a seriously warm wood fire going and on a 4 hour car ride.  most cases these are just right. they seem like they are well built. cuffs and pockets show no sign of fraying after several weeks of wear.  *note*  if you are used to buying levi's or most loose fit brands you will want to buy a size larger.  when these say 38 inch they mean 38 inch.  they don't mean 38 inch if you like swimming in your pants and 40 inch if you like a good fit.
final thoughts - if its cold where you live you'll love these, like i said in the title "so great i bought a second pair"