I bought a DSE901B from ebay for $29, including shipping. It took about a week to reach me. I mention this because I just revived what I thought was a dead atomizer, and it is once again vaping like a pro. It is the original atomizer that I bought two months ago. I am using it now because my two Duras are once again dead, and I am waiting on a new one. One major issue with the DSE901 is short cartridge life. One major advantage of the Dura is longer cartridge life. Is anyone aware that the Dura cartridges work on the DSE901's. This one fits a bit loose, so that is a bit of a pain, BUT it works great. Conversely, the DSE cartridges also fit the Dura if you want to go that route.