I have a few questions.  First off, how often should I expect to replace my atomizer?  I know that they're unpredictable and that you can never really tell how long they will last (DOA to a year, depending on luck), but on average would a month be in the ballpark of how often I should expect to order new replacements? 
 
Which brings me to another question; shipping to Canada.  I've decided I'm probably going to go with mikeusa, and they use UPS Priority.  I assume they're shipping from America, so how long should I expect to wait?  If there's anyone else from Canada where who has ordered with them, how long did you wait? 
 
Joye 510: 
Direct dripping is when you drip around 3 drops directly onto the atomizer.  How many puffs should I expect to take before I have to drip again?  What happens if I misjudge and run the atomizer dry?  And lastly, if I'm using a cartridge (with ejuice in it), can I still easily direct drip?  And should I? 
 
Thanks so much.