Four stars because the fan hasn't been through a summer of use yet. It replaces a 12-y-o Vornado 633 with a burnt up cord. The 630's switch on the side is more convenient; the base seems sturdier. It also seems a bit quieter except on Hi which is really loud but moves a ton of air. Downside, so far: harder to pick up without a built-in handle on the back. Look forward to easier cleaning, per the sales blurb. Hope that's true. Had to use an air compressor to blow gunk off the 633 blades.