Everything is packed clean, is well explained.
I can only recommend to read the instructions carefully. Is not that difficult but incorrect test procedure, there is a wrong result.
The handling is quite simple. If you're a little tense or insecure, a second person is not bad, but goes for normal clever people well alone.
Painful it was not - in such an important test, it would also have been in my opinion irrelevant if it would hurt anything.
Of course, I can not verify that the test is working correctly. But the whole thing to me a very serious impression.
The NanoRepro is a known, publicly listed German company.
Who has the suspicion that he is suffering from celiac disease / sprue and wants to test this at home, for the test is the right place.
I'm talking about "useful" feedback and please those who want to write me a comment, the rate my review as "unhelpful" - so I can REPLACE the missing information and so improve the review.