i love useing the teardrop, for one its comfortable on the hand. but the drawback is that the button is exposed more than the wedge design mouse you will get a few click's off and not release you have your finger close to the button or you hit the side of the mouse against something and what ever you hit will click it.

i don't like the wedge mouse cause after awhile it starts to hurt your hand but the good pint is is that the button is in a great place and isnt as easy to trigger a click cause of a finger with a mind of its own or by bumping it into something or by picking it up.

but i would rather use the tear drop design cause like i said its easier on the hand