Well, I'm on my 2nd day, and the TW 901 atty is working just fine for me. It's not a new one either - I've been using it off and on for past 1 month with regular 901 - and at one point, I thought it might have died - but SD revived it. Just needed to burn the coil pretty hot and all the gunks seemed to be gone now, and it's glowing rather evenly inside, which is a good sign I think. Also vapor production isn't that much different from the original SD one I had first.
Then again, Attys are always something of hit or miss... so I'll take my own experience with grain of salt.
As per LV - I think when Zi Moshi comes back from his doing-good-in-africa (good for him!), I might consider getting 801 one.
Price and performance that I hear, seems to be top notch. 
Then again, Attys are always something of hit or miss... so I'll take my own experience with grain of salt.
As per LV - I think when Zi Moshi comes back from his doing-good-in-africa (good for him!), I might consider getting 801 one.