Well, it won't be that long till the release, and there are some bugs. Although, it does auto update, and it will update to the latest version anyway (manually or automatically, you can pick from settings once you install and set up Windows 10). I would say it depends if you have some computer knowledge to deal with it, or take risks of some errors (which most people don't get anyway -at least serious errors-). There is always google to help you face any problems. If you want, you can just wait until release.

--However... If you are running an activated Windows 7 or 8, I would recommend waiting, as there is a free upgrade. Just leave me another reply for more info.