30 Days Return Policy DV247

I have read the terms and conditions thoroughly, but just want to check if I have the right gist or not.

If you don't like the product within 30 days of receiving it, even if you have opened and used it, you can return it?

In theory if you couldn't decide between 2 mixers, you could buy both, and then return 1 within 30 days and just have to pay for postage and packaging?

Sorry if I have misunderstood this.

Has anyone done this? Surely they must get people buying CDJs and a mixer just to practice on for a couple of weeks and then send back?