(Read update at the end to compare initial impression with today's)
Although I haven't had the chance to thoroughly test it yet, I rush to leave a review to warn others before they buy it. It is by far the thinnest cover out of the dozens of others I have bought over time. Literally like cigarette paper. Taking it out of its packaging, even before using it, it already has creases which, due to the thinness of the material, are likely to turn into tears soon (some already appear as borderline cracks). To understand how thin and fake the material is, even though it is by far the largest cover I have purchased, it is also by far the lightest (and I fear this will prove to be its only advantage, its almost negligible weight for its size). In the previous comparison, it competes with low-quality covers from Jumbo, Lidl, which even those have a better price/quality ratio. It seems cheap for its size, but when you hold it in your hands, you will realize that it is still expensive. The seams are single, not even a mention of heat sealing at the joints. For now, the only use I see for it is in a closed space, and even then, in a place where no one unrelated will accidentally pull or touch it, while putting it on and taking it off will be done carefully so as not to tear it on sharp parts of the motorcycle (fairings, mirrors, etc.).
Its dimensions are more than enough for the 4XL size. It does not fit back into the bag it comes with unless you iron it, so you will need to look for another case if you buy it (a small downside, expected if one sees how small its package is).
I will come back later when I try it for outdoor use. I will be surprised if some miracle happens and it withstands such material, but I hope for it and I will be happy to immediately change the rating.
UPDATE: Almost 5 months later, but with very sparse use, I have to say the following: The material has held up until today for outdoor use, but putting it on and taking it off requires careful handling. Also, due to its large size, the cover does not stretch and therefore it is less strained. Conclusion: If you are very careful and park in a place without strong winds, it is worth considering as an option, especially if you plan to take it with you on a trip since it is extremely lightweight (there is no lighter option) and compresses a lot, so it doesn't take up space.