I have not met any problems with the IQOS. As far as I know or have seen anywhere, it is NOT approved in the USA by the FDA or anyone else.. It may have been approved by YOUR country's equivalent of the FDA, but not here in the US. It is not for sale here.
You could try some of the international forums I guess, but honestly, I haven't seen much discussion of it at all. If you are having trouble using it you may want to watch some YouTube reviews of the device.
Also, yes, it's heat not burn technology but I think the majority of posters are already vaping steadily. Even if I had ACCESS to it I wouldn't care to try it, I am happy vaping and don't really want to "mess" with that, OR deal with the expense, messiness, not knowing what is IN the heat sticks and etc.
Best of luck though, I hope you get things resolved.
Anna