FWIW, I've been using the LR attys on my eGo for over a week with no issue. I've read others have been doing the same for 3 weeks, same thing, no problems.
Not a big sample size, I know. But then again, the LRs haven't been out very long...
I get about an hour's worth less usage with the LRs and the eGo batt. (shorter drags and less hits, I think)