I have also had a less than glowing experience with SE...
The only way I can see to do business ever again with SE is if the products are physically in front of me (Eg; a Mall Kiosk) and I absolutely need a pre-filled cart and can't wait.
In all fairness to them, their tobacco flavored carts do taste better than NJoys....
The thing that really burnt me up about SE was the way I was treated over the phone by two of their customer service reps (one of them was quite helpful-- I had to deal with 4 or 5 of them) and the insult on the injury was the time I had to wait for US shipping... With every other US vendor the shipping time was within 2-4 days... but not these guys!!! Okay.... A company calls you up, leaves a message on your answering machine about your online order (They wouldn't handle it over email--- how I wanted to handle it), more or less tells you your online order didn't ship, despite the fact they have e-mailed you a shipping notice, and tells you they don't have the product you ordered.... When you call them back you have to contact customer service 4 times (2 of the reps just hang up on you after transferring you to several other people... on the third attempt someone finally tells you they only do online CS from 9-5 Eastern)... Finally two days later one of their reps finally gets back to you by phone after you request to handle the issue by email (It was after 5 Eastern BTW- that is like pouring salt in the wound there)... Asks if they can ship a slightly different product to you.... Okay, you agree-- but instead of tossing in something for your troubles or express overnighting it, because they screwed up, they ship your order by the slowest possible means. When you get the products the battery they shipped you has problems (Its flashing 20 times off and on).... after how they treated you already, no offense, but even though their manual indicates that I should replace their product (Its under warranty so it would be free) I have just decided not to do business with them online/through the mail ever again!
Outside of the vendors I listed above, I have also done business with 2 Chinese vendors and Greensmokes (Not for RN 4081 stuff-- Obviously as they are selling E9/V9's)... The only truly poor experience I have had so far is with SE.