My first ecig was purchased from Overstock.com. It is the Crown7 Hydro. A few days later I ordered the Mega Titan 510 from Totally Wicked. There is no comparison and of course I used the 510 almost exclusivey. As far as the Crown7, I had a bad experience with both the product and the customer service. The atomizer died within weeks, even though it was only gently used intermittently. One of the batteries lasts barely 12 minutes. I wrote to the company asking for product details, specs, dimensions. (As I planned to purchase replacement items from China.) Their response to me was imho quite wrong for a company wishing to succeed. They literally put the word "SPAM" in their subject line when they replied. In the body of their email they actuallly used the word "tactics" toward my request for product specs, saying no one had ever asked them before for such information.
Their claims on their website are proposterous (they claim that their technology is so much better than others when they clearly farm out the manufacturing, probably to China) On the contact page they prematurely admonish you to "be respectful" when you write to them. What is that all about? I went back and forth with them a little bit and then just decided to drop it, but to report my experience with them when needed. I have saved all emails.
I strongy do Not recommend them. Thank you.