Repeating what I said a couple of posts ago: it still seems that a lot of people are downplaying the fact that many, many vapers like to have different-sized devices for different occasions. My friend Dan, a 42-year (ex)-smoker, takes his eGo-C with him to work, and enjoys his ProVari when he comes home. Is the Joyetech Twist a direct replacement for the ProVari? No, of course not. Criticizing it for not having the same voltage curve throughout the discharging of the battery is like criticizing a Toyota Camry, which might be someone's "daily driver" for not being able to accelerate as fast as the Dodge Viper that that same person takes out on the weekend.
Unless the voltage control knob/mechanism turns out to be problematic, I think that owners of VV APVs would do well to accept the likelihood that the Twist is a very good way to get into VV that some people will stick with for a long time, while others will add more advanced VV and/or VW devices to their arsenal, while most likely continuing to use the Twist on many occasions.
Most experienced vapers would probably be of the opinion that having a backup PV, and ideally a backup for the backup, is a very good way to minimize the risk of ever being tempted to fire up a stinkie. IMO the Twist is currently a no-brainer choice for a backup PV, and as such is also a very solid choice for the first PV for a beginner, since the money spent on it will therefore not be money wasted if and when that beginner adds a more advanced VV device to his arsenal.
Lastly, I disagree that the 650 mah Twist will be selling for $30-35 any time soon, unless it's years from now and inflation enters the picture. Health Cabin is selling it for $21.50 right now, and I have a hard time believing that they are selling it at a loss. That just doesn't ring true.