Overall all we like the blender.  The impeller on container is so well made I doubt I'll have any issues with it leaking.  It's easy to clean, and performance of blender is excellent.  It does a great job.  The base is heavy, a little bulky, but it does not jump around. The only minor issue is the noise level.  It's a little loud, but it blends so fast that noise is for a very short duration.