I have two capo jersies I really like. I haven't bothered with the Castelli (even though my last name is only one letter off!) as I've heard they run ridiculously small. I haven't got the budget to buy and return and buy and return to figure out what size I wear with them. screw it, will just get another Capo or twin six (though I find the twin six sleeves a little too short for my tan lines...)