Aqua Marina Steam 412 2022 UK inflatable kayak Loch Lomond 

Sorry for the late reply. I thought the same, the psi requirement is quite low compared to others. It states never to over inflate above the stated pressure so I followed those instructions and it was solid. I never felt like it needed more. After leaving overnight the pressure had dripped a little and I topped it up but only to the stated max. I had packed it quite full, a large fresh water container full, right at the front, packs, gear, even fire wood, all at the same time. It felt heavy but tracked perfect. The weather was bad and it filled with water due to waves over the bow (bad place to stash the fresh water container because it was really heavy) even then it felt capable. There was a sense of a slight drop in rigidity but not serious enough to cause any concern, also I knew after 2 hours i would reach my destination and offload the weight I would say that it was unlikely I reached the 180kg limit, even with the water that came on from the waves so if you think your combined total weight for passengers and gear will top about 160kg then I would be looking for a firmer or bigger craft or even 1 each. It would certainly take 2 adults and 2 gear packs without any issue but I wouldn't like to take it to the max in terms of load. This is why I got the 2 seater for solo use and I can take more equipment

@@jasitweb Cheers for the detailed and very informative response. I ended up getting a deal on a different one with higher pressure but lacking auto drain valves. So far I've been on the sea twice, one day tandem and the next solo. There was some ambiguity as to the correct PSI for the kayak so I erred on the side of caution. The tandem day was the first outing so it was also the most cautious when inflating. The kayak was great, stable and tracked worlds better than my previous cheap low pressure kayak. But I had the feeling it was held back a bit by my caution. The second time I went solo and increased the pressure, though still not to the maximum. It was fast! Easy stroking just zipped me along and turns were immediate. On the way back, the current increased and changed direction to oppose me. Also, a fairly strong head wind that was not forecasted made the sea quite choppy. The waves brought water into the kayak, but i didn't notice it under the dropstitch floor and wasn't put off by the lack of self-bailing valves. It was hard work getting back and I'm not sure how I would have accomplished it in my old low pressure kayak.