But the way the reviewers bash Sigelei after the threats and all that after the first video makes me wonder if they aren't just salty.
Sigelei shouldn't be worried about reviewers. They should be worried about regulators. The first ISO working group on vaping equipment is meeting in October, to lay the groundwork for the first international standards to apply to the industry. Many international standards are voluntary. However, in areas which have impact on human health, safety or the environment, standards tend to be adopted as compulsory specifications by most countries. With the concerns around the health aspects of vaping, it's a no-brainer that most countries will require compliance with standards in order to access markets. And with TC being implemented for primarily health reasons (not vaping nickel and titanium at hazardous temps), it's an equal no-brainer that TC is going to be one of the most stringent areas in the standards.
Sigelei can threaten Daniel. They can't threaten regulators. They had better make hay while the sun shines because their window of opportunity is closing fast. Once the FDA, the EU and other regulatory bodies take control, TC that doesn't work (or is even inaccurate beyond minimum limits) is going to become a barrier to market access. Regulators don't get involved in furious disagreements over the internet. They know only two words: "pass" and "fail". If it's the latter, they just lock the product out of the market, end of discussion. In that case, the manufacturer can either fix the product and comply with the standard. Or they can cease operations and close up shop. That is a looming reality that Sigelei will have to take on board, and right sharpish too.