Recently, many motion data have been created because 3D CG animations have become in great demand for movie and video game industries. We need any tools that help us to efficiently retrieve required motions from such a motion data pool. The authors have already proposed a motion retrieval system using Interactive Evolutionary Computation (IEC) based on Genetic Algorithm (GA) and motion features based on Laban Movement Analysis (LMA). In this paper, the authors especially clarify the usefulness of the system by showing experimental results of motion retrievals practically performed by several users. The results indicate that the proposed system is effective for retrieving motion data from a motion database including many motions more than one thousand.