Landmark Aviation in Sioux Falls may be the worst FBO in the country. As soon as they came into Sioux Falls, they raised the rates on everything from mechanic services to the price of gas. The price of gas became so high that you could save money landing at a nearby FBO, filling up your plane, and then finishing the trip home. A new FBO just moved into the city. It will be very interesting to see if competition changes the attitude of Landmark. read more