hi john;
i've heard stories of people haveing problems with all the brands of epoxy. keeping in mind that i have used nothing but west systems 105 resin and 207 hardener on three boats, i have had NO problems. on my first boat i didn't have "jitters", more like PANIC! it turned out beautiful! the little bit more money i spend on the west is well worth the the sleep i would use if i switched to a less expensive brand just to save a couple bucks.
just my two bits;
daren.....