Well after alot of researching and reading ALOT of threads on this forum I have decided to purchase my first e-cig. Only problem is I can't decide between a m401 and a 510. Both seem to have thier ups and downs and both seem like an excellent choice but I just can't decide. What would be easier for a newb to start on? Which is generally considered more reliable in terms of the life of the atomizers and batterys? Thanks for any help.