I just switched to a Catrike Expedition. The main reason was comfort. I don't have enough miles to speak much about safety however I can tell you that I feel that people notice and give me room as much as on a bike if not more. I was out today and a bus driver who had pulled over to pick someone up waited until I passed him to pull out and then waved as I went by. The one thing that's taken me some time to get used to is not automatically putting my foot down on the ground when I stop at a light or sign. I'm loving the first couple of hundred miles so far without the aches and pains associated with spending the same amount of time on a bike.