I can remember back to my supplement industry days when capsaicin was a big deal. It had a couple studies showing it increased fat burning and more importantly customers would actually 'feel' their fat burner working when it had capsaicin in it.
Unfortunately, this 'feel' was mostly increased gustatory sweating (not your metabolism revving up 2017% higher than normal), and in my personal opinion all the capsaicin in the world isn't going to make you lose weight.
However, capsaicin isn't completely worthless. After all, it's the chemical in chili peppers that makes them "hot". And, from my experience most pungent components of foods such as capsaicin tend to have health benefits.
Lucky for us a company has finally found a great way to use capsaicin in one of their products.
PS- Happy Valentine's Day!