I'm looking at ordering one as well. I already have a Chromebook and Chrome on my computer and phone. I'm curious how all of this will together. They certainly made the decision much easier with the price they are asking for.
For some reason, the Chromecast app from the Play Store doesn't find my Chromecast, BUT I can still stream from the Youtube and Netflix apps. Overall, if you don't have a smart TV or something to watch Netflix/Youtube on your TV with, then the Chromecast is a great cheap option. Tab casting from a desktop/laptop is pretty broken right now, though, and hopefully it'll be fixed.
Chromecast app and the RAZR / RAZR Maxx do not play nicely together (based on my experience and reviews on Google Play) I could not configure my Chromecast using my phone. Once I set it up using my laptop, I was able to use my phone for Netflix. Pretty cool really. I would expect an updated version of the app soon. Then another, and another...
Yes, I've had my Chromecast since the first day it went on sale as I was lucky enough to snag one at a Best Buy. There is a well-documented issue with the Razr/Razr Maxx and hopefully it will be fixed soon. It streams Netflix and YouTube perfectly, but there are issues trying to stream from the Play Music and Play Movies & TV apps and as stated above the phone also doesn't see the Chromecast unit on the network. From your laptop or PC, you can also mirror anything you can see in your Chrome browser to the TV and there are ways to also view locally stored pictures and video. The future should hold great promise and for $35, it's a steal. They originally had 3 free months of Netflix too and I got that so my net cost was about $11. It was so popular, they pulled that promotion at the end of the first day though. I'll probably order a 2nd one for my bedroom TV.
Chromecast works flawlessly with my Galaxy Tab 2 and my laptop, but works terribly with my (Google-owned company) Motorola Razr Maxx. I thought the Chromecast was defective until I secondly tried my Tab 2.