I bought this strictly for juicing celery and it's my first extractor. I was concerned about the negative comments regarding it's "moving all around the counter." When I first used it, this thing purred like a kitten and got the job done. After about 3 uses, and midway through my celery run, I noticed the celery had a hard time going down and had to be persuaded by heavy pressure on the plunger Then it started the notorious "dancing" around the counter. I discovered the reason why and the solution. The strainer has small micro blades. When they become clogged they stop cutting. When they stop cutting and more pressure is applied, the strainer is no longer seated properly on the base, so it is off kilter and commences wobbling. What I did was I looked down the chute, I saw the clogged blades, unplugged it, took out the strainer rinsed it off and properly seated it on the base. Problem solved. Works like new...again. So don't apply undue pressure, don't force it and if you're cutting really coarse items, check the blades periodically and clean them as necessary. It now works perfectly fine and fast.