The carto I received with my Liquinator was punched, not slotted- and I got it from Vaporessence. I got just over 3 weeks of heavy vaping from one carto, which was amazing. It finally got clogged and I had to replace it, now I've got some issues with flooding :-( No matter what I've tried it gurgles horribly. Trying to sort that out right now. Maybe the new carto is just a bad one. Cleaned out the old carto and it's drying out- going to see if that makes a difference.
Anyway, I had gotten quite a bit out of the one carto with the Liquinator, so the price of buying the pre-punched cartos seemed like a decent deal to me.