My only concern is that you can take a LOT of money and buy green instead.

But my unit is quite digital to be honest. As for accuracy. I've tested it with the laser thermometers and it's within 3deg c. It also has a digital readout of actual temp so you can see if you're drawing too hard and making the heat a moot point.

I've had mine for over 6 months needing nothing more than a cleaning.

I'm all for these volcanos but it does need to be stated that you shouldn't have to go into debt for quality vapor.