I can speak to this a bit, having piloted a Candela (the speed boat version, I forget the number) on the Swedish west coast where seas can get notoriously chopp

I can speak to this a bit, having piloted a Candela (the speed boat version, I forget the number) on the Swedish west coast where seas can get notoriously choppy seemingly out of nowhere. This is a couple of years ago though so maybe they've improved things since. The impact of any waves higher than maybe a meter is likely to make the software take you in for a rather rude landing, and quick stop. It's unlike any boat of that size I've piloted, it was very heavy and it never felt like you were totally in control, with some small but quite noticeable latency between input and action. Felt more like piloting a larger ship than a small speed boat. The fact that it felt like you were at the mercy of the controlling software meant it became a very anxious ride as soon as you ran into a bit of choppy waters. When flying it was a very nice ride, but when you're not you have to go very slow or you quickly run out of battery. It was not particularly pleasant doing 3-4 knots in choppy waters, even if it did seem rather stable presumably due to the wide base, low height and deep rudders (foils). Fine boat in calm seas for sure, but I wouldn't use it for anything else. Should do fine in fair weather in central Stockholm though.