Weird buttons. This model has buttons for both low speed and high speed blending, but they only work if you press the "unlock" button on the top of the blender before you start pushing the speed buttons. The theory of this is fine, but it's a bit unwieldy in practice, because you can't push the unlock button with the same hand you use to push the speed buttons. Furthermore, the speed buttons aren't very responsive, and sometimes they just cut out. Then you have to do the two-handed unlock button-speed button combo again. The product is probably worth the $35 I paid for it (other immersion blenders are at least $60)

There was a problem with the first blender I ordered...I think the unlock button was broken, so the motor just wouldn't start. But Wayfair replaced the broken blender, and I'm very satisfied with their customer service!