Having experience with the HerbalAire vs. the 7th Floor lineup I always have and always will continue to recommend the HerbalAire above the competition. In regard to extraction efficiency, versatility, durability, and convenience of use the HA cannot be topped.
IMO the 7th Floor offerings are rudimentary in comparison. They are still offering the same simple 'Hotbox-esque' laminar air flow from a soldering element and controlled by a rheostat. This setup offers very little precision or accuracy, minimal heat retention, and requires a powder fine grind with intermittent stirring for optimal results because of minimal heat penetration.
Also pertinent to the conversation:
A note for those that think visibility or 'cloudiness' is an accurate gauge of hit potency; it's not.
Visibility/thickness of vapor is caused by the condensation of vapor against the particulate in the airstream and lack of fresh air. The percentage of particulate and fresh air in the airstream are also the main contributing factors in the harshness of each hit.
Visibility of vapor is incidental.
When you grind or go to very high temperatures you allow far more particulate into the airstream; which appears to create 'thicker/bigger' hits, but in reality they are no more potent than the 'thinner' looking, less harsh clouds HA would have produced without grinding.
Knowing this fact, it becomes obvious as to why other vapes that require a fine grind and/or stirring throughout the session to extract all the actives appear to be 'cloudier' or 'heavier hitters', when in reality they are extracting less of the total actives per hit; producing weaker, yet cloudier/thicker/harsher vapor.