I have never seen such a fundamental mistake in a user's guide. The assembly instructions show four parts: 1. Handle, 2. Wand, 3. Vacuum Base, and 4. Tool. The assembly instructions are quite clear, but wrong. According to the guide, step one is to insert handle into the base. No. It seems to almost fit -- but rotates and does not lock. The correct procedure is to insert the wand into the base first and to then attach the wand to the handle. I was ready to return the product until I finally figured out the correct sequence.