The Dyson bladeless fan is the most disappointing appliance I have ever owned. I purchased one a little over a year ago and used it for about a week, TRYING as hard as I could to justify it. In the end, there were no redeeming qualities that could justify the exorbitant price tag.
It was noisy, inefficient and flimsy. I thought too, that it would be nice to have with kids; but it is so fragile that a slight bump would render it a useless pile of plastic shards. There is not "space age" technology, there are no benefits to this fan. There is still a fan assembly, in the base, that is merely piped through a slit. I can only imagine that, if you approach it from an efficiency stand point, it is likely a tremendous waste of electricity, as well.
After a week, I returned it and bought a top of the line Vornado for a third of the price. It doesn't oscillate, but it WORKS, and works very well.
The Dyson fan is undeniably nice looking, and LOOKS like a technological advancement but, quite frankly, the Rube Goldberg of air movers.