As expected, there is no single perfect tent for Iceland or indeed anywhere else outside of the North Pole or the heights of the Himalayas. Even then, there might be several choices.
Everything depends on personal taste, the compromises one is prepared to make, the likely usage and, not least, the money someone is prepared to spend. The latter is most certainly true of tents in the Hilleberg price range. Whether it is worth spending close to or over £1000 on a tent that might be used once but keeps you dry and warm - on one day - when a gale and driving rain batters the fly sheet or whether a tent at say £200 would have done just as well are debatable points. Of course a gale and driving rain in Iceland in summer, is not much different to a gale or driving rain in Italy, France, Germany or even the UK, so there is little point in making it geography specific, unless you intend to conquer K2 next time out.
I don’t buy into the, “It’s made in China, therefore it must be shite and the price must be reflected in it accordingly” mantra. It all depends on the quality control and the design of the product in the first place. Does a Hilleberg warrant its price tag if it is stitched together in a Nordic country but using components that come entirely from China, Vietnam, the Philippines or Mexico? What happens if the entire tent is conceived and designed entirely in Sweden but everything stitched and bundled in say, Bangladesh or Romania, but with decent quality control? Does the price stay the same, halve or quarter? Or is the entire idea of buying the tent at all, rejected out of hand, as it MUST be a rip-off and HAS to be shite? If Hilleberg (or any other manufacturer) gets a justifiable reputation for overpriced, poor quality control, then the company will fail, irrespective of where the product comes from; it’s as simple as that.
PS Not unexpectedly, there are YouTube videos where bods slate Hilleberg. Who knows, they may be right..... or they might be wrong..... or they maybe just didn’t look after the tent in the first place..... or maybe they were just unlucky..... or maybe Hilleberg didn’t send them a free one? One thing is certain, there are more happy Hilleberg owners than there are unhappy ones. That will last for only as long as the product is of reliably good quality, backed by a good after-sale service and priced at a figure that people are prepared to pay.