A liggcykel that is 2 wheel or 3 depends on preference. My choice of 3 was my need to go through the city and try to bike as much of the year as possible, even winter. I will learn within a year how the experiment with 3 wheel is like. Because of the type of traffic I have to bike through, downtown Stockholm, there are many lights, other bikes and people. It felt more secure with the 3 wheel.
At some stage I hope to experiment with a 2 wheel. Curves is something one has to be careful with the trike. Straight lines are great but curves is trickier. I am experimenting with lowering the inclination of the seat and to see if it helps.