Well I am impressed by this blender. It blends very well.  I drink my greens every morning. and it blends spinach and kale well.  It didn't blend the seeds from the blackberries to well but maybe it need some extra time to blend. I had seen some plaints about the lid, it fits tight and I like that. It is not too tight that you cannot get it off, it has a good fit.  I have not tried the other attachment yet.