Perfect and discreet
Tried the girl scout and quantum and both hit hard. I have a big tolerance and with 3-4 hits I can still do my work and not feel tired/ stressed. Very discreet and almost smaller than a pen especially when using this smaller .6ml tip. I do prefer the 1ml tips for $80 lasts a lot longer than these but for $45 you just can't go wrong. Get a few, you won't regret it!