Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Does the job...but has a critical design flaw

This blender does a great job blending the food but the design is flawed. I can only assume that they intended to simplify use by skipping a button or switch. What you do instead is push-down the top part (motor) into the base where the blade is balanced on a metal tip. The problem is that the motor starts before the top and blade are secure. The result is two plastic pieces that aren't moving in harmony; and the gears grind down .... game over.You can make this work without the grinding of the gears only if a. you always combine the two parts perfectly or b. unplug before snapping together.In our case, my wife wasn't properly licensed and she seems to grind the gears every time :) The unit lasted about two weeks. We use an immersion blender now.