What are they? There has to be some!
I have been content with good quality NV for my work for a good few years now, but unfortunately I am now experiencing problems with it. So, I'm about to start a very important New rabbit control contract, I've decided that thermal is the new way forward. But! Before I shell out a decent wedge on something I know little about I thought it prudent to ask the above question.
So gentlemen with true life experience of using thermal, what are the downsides please?