Does anyone have any knowledge or first hand experience of far infrared panel heaters?

Came across them by chance and got me wondering if they're any good?

We've recently moved into an old stone cottage (built around 1830), which isn't on mains gas and so has an oil fired boiler central heating system. The boiler looks fairly old and I would imagine I'll have to replace it before too long and so on seeing these I wondered if they might be a viable alternative.

The marketing material tries to throw a lot of 'science', numbers and way too many references to random articles/publications which makes me a little suspicious or am I just overly cynical?

The ones I came across are https://www.herschel-infrared.com/ although there seems to be a number of manufacturers.

Paul.