I bought two complete cigs in both the EVO and 510 from Innovapor back in June 09 (i noticed they are no longer selling the evo). Anyhow, i switch between the two, vaping the EVO during the day and the 510 at night (club dj). I was actually on the forums looking for a manual battery for the EVO (better flavor/doesn't burn through juice like 510) when i came across this thread.
Soooo, I am STILL on the FIRST atomizer for both of them - 7 months later... I never clean them, and have only used Ecopure juice in both. I am actually about to start trying other flavors for the first time. I wanted to repeat that many on these forums have said that the juice has a lot to do with cartridge life, so I just thought I would be relevant to share my experience...
ps, I am still getting great vapor production!