The later survey, CASAA I believe. I didn't like the options to one of the main questions. Among the answers it seemed to be slanted. Why did you start using an e-cig? For me and I'd guess many if not almost all it was "to quit smoking." It wasn't to get nicotine but in a way that's healthier than smoking, it wasn't because I saved money (although I do), it wasn't to reduce although that's how I started, e-cig and an analog when I felt like it based on advice from folks here and was off analogs in 3 days. None of those fancy reasons, none of that extra logic, just "to quit smoking."