Some of the aircraft on their website are single engine props, not jets. Others are VLJs that don't even have a proper toilet with a door.....
These light jets and very light jets are not intended to fly with all seats filled. It's literally more cramped and less comfortable than Ryanair. Two pax in a VLJ is fine. But six pax and you want a mid size at least, even for short flights. It's one thing of everyone knows each other such as a family traveling together. But six strangers cramped into a light jet or four strangers in a VLJ. Not a memorable experience. Certainly not in a good way.