I RAN from my 901 to the Nebula, and have absolutely no intentions of turning back. For about the same cost as a single 901 atty, I can get five
juice-filled cartomizers that require me to drip at least five times less often; never spit
juice in my mouth; and deliver nice, full-bodied hits far more often than I was ever able to get out of my 901s. Plus, the cartomizer is excessively noisy (or airy) only when I am sucking too hard (usually due to my juice or battery running low), or when my air-flow path is out of alignment; both of which are easily addressed.
IMO, my 901 attys can rest in peace.