I had posted earlier about my eRoll kit, that I liked it but seemed like one battery didn't work as well. It seems that the problem was actually with one of the starter atomoizers I got, not the battery. Replaced the atomizer and it works much better.
I still really like the kit and use it as my main pv right now. I'm going to be attempting to clean two attys soon, really interested in how long I can make them last. I haven't had any issues with the seven cartridges I currently have in use, yet, other than a decent amount of condensation built up inside the non-liquid part of the cartridge.
I find that on a weekend I will have to fill about 10 cartridges. I use a syringe to fill instead of removing the cap. I bought a carto holder from Smokeless Image that works pretty well at holding the cartridges, so I can have five pre-filled. I have found that I need to charge the PCC daily, it will last me about 10 hours before charging.
Some liquids definitely work better than others. I've found that SI's smooththol (Niquid) works really well, as does Virgin Vapors Kona Koffee Milkshake. Some other coffee flavors, RY4's, etc don't seem to work as well - low flavor or low vapor.
I've shown this kit to two smokers, and am pretty sure that they plan to make it their first PV.