I dont know why there is so much negativity around these caps, I think the effect is dope. And Ive seen a lot of illy handstyle tags obviously sprayed through these type of caps.
My favorite inks/markers out there are Krink. Doesn't have a nasty smell like most inks, and has sick colors. First time taggers, I definately recommend this.
I've seen it being used right in front of my eyes, and I've tryed it. I can tell you from experience it's not bad, but it's nothing special.. So unless you bomb bricks and concrete outside the corner store, it's nothing to lose sleep over.