My biggest question when buying this product fell on its real utility. Admittedly, Chromecast proves handy when you want to show a web document (videos, articles, pictures ...) of the computer to the TV or caster (projecting) the screen of his or her smartphone tablet on the tv.
But we must also admit that the object in question is still limited by the features! Apart from a few services like Netflix, Plex, and FrancetvPluzz CanalPlay developers are not rushing to take advantage of the opportunities Chromecast. And that's a shame!
For the moment, therefore, I would summarize Chromecast a high tech object that simplifies life but opportunities still too undeveloped.
30 is a fair price for a product such as this one but think carefully about the use you will make! ;)