Many thanks for the comments!
David & a gould, it is available in the US and one doesn't need to travel to Germany to get one! There are a few huckePACKs already in the US, Japan, Hong Kong, Norway - just send Mateusz an Email to the here mentioned address, and you will receive an answer with an Excel-based configurator (yes, works fine on a Mac and Linux with Open Office) which lets you put together your dream huckePACK.
Mike, a good idea for those who use packliners (I don't). It is right that depending on the mat used it can be difficult to unroll it further and space might be "lost", though I usually just use that lost space for items like my bivy and other soft items to fill it up, which works fine.
Sabine, I put the Platypus in the big pocket for that reason. If one uses the included dyneema cord to create a side compression system, it also can help with that - just tug the platy under a cord and it should be fine! Comfort zone is indeed a personal matter & anatomy. I hope you manage to work out something with Mateusz regarding the shoulder straps!
Basti, maybe a little mix-up with the volumes. I will look into it and have it corrected if needed. Regarding the "unique feature" - well, imo it ain't unique, I can do that with the majority of packs hanging on my wall =) Though you are correct, it is a nice feature!
Mark, a webshop would make the live of potential customers a lot easier, for sure. I went over to carry my puukko in a pant (cargo) pocket, which allows it to be quick to grab in most situations. Losing my puukko is not an option for me, hence in the past I also have carried it in the front mesh pocket and secured it with a simple knot from the lid/ compression line.