I've ordered a couple attys for my 901 (one recently, one a while back) and they've both been kind of blah. Poor vapor production and flavor with next to no life span. Now, these are the newer style ones, so maybe it's just how it is with them. I keep having to go back to an older style atty that is well past its prime. Is this a case of the new models being inferior to the old, or am I just having bad luck?