I hate them... I had to get a cat-scan with iv-contrast; they poked me 5 times hit the vain 3 of the 5 and every time my vein blew before they could get the contrast in. So I had to reschedule and go for round two. I could not be an IV user if I wanted to. I have one decent vein between my two left knuckles, if I hold my hand just right, to draw blood.... What's "funny" if I am type 1 diabetic and get blood test every 3 mo for the past 38 years....lol....