I've been using a DCT from Mad Vapes for 1.5 months. I use the 1.5 - 1.7 ohm pre-punched replacements on my eGo type batteries and get killer vapor, flavor, and life out of them.
I've used 1.5's from Avid Vaper(?) as well and they work very nicely, too.
The triple punched cartos from MV flood badly using Hangsen RY4 though. It's a high PG blend. I think the triples are made for high VG blends.