Might be too early but my first impression is very positive. First, the thing has never touched herb, so the odor is negligible. Second, it's on demand, as compared to the PnP, where you're committing to a 3-4 minute heat up and then you have to keep going...two seconds and then a slow inhale is an awesome and product friendly alternative. Third, as opposed to wax in cotton for the PnP/bullet, I can see how close I am to killing the load. Fourth, it doesn't get hot as hell, like the PnP. Fifth, it feels far more solid than the PnP. Sixth, no cotton necessary. Seventh, it seems to last longer.
This thing is closer to the MFLB than the PnP in terms of stealth. It would probably pass my patented Xbox test!
Looking forward to trying out the Herc.