You'll know what the Chromecast does, I'm sure, as that's why you're looking at the reviews.
The Chromecast is a fantastic little device and for £30 you can stream content from your Android/Apple device to your TV with little effort.
To be honest, I didn't really need this device as my Virgin Tivo box already gives me access to Netflix, YouTube and catch-up services such as iPlayer, etc. However, I'd wanted one for a while and the option to "cast" web content to the television along with music from Google Music was a clincher.
It streams content from Netflix. YouTube and iPlayer easily over my network without stuttering or buffering. I have used a couple of Android phones, an iPad Air, a Windows 8 laptop and a Windows 7 machine without any issue. It was simple enough to download the Chromecast app from the Android Play Store. It then gives you a list of other compatible apps such as iPlayer, Netflix, etc.
Setup was a breeze and it recognised my Wifi connection on my Virgin Superhub 2. I simply had to type in my router security key and I was away. However, it must be noted that the Chromecast won't recognise or be able to connect to a 5GHz Wifi signal, only the standard 2.4GHz.
I tend to use the Windows 8 laptop more than anything else - it's a Toshiba tablet/laptop hybrid kind of thing - and when I want to view something on the television I either use the cast icon on Chrome or when on Netflix I press the cast icon again and it gives me the option to view on "this device" or the Chromecast. A simple press on the Chromecast option and within seconds the Netflix splash screen appears on my TV and the programme starts to stream. It really is a painless procedure.
I've only had a couple of issues when streaming content - a black screen with a message "this programme is not available, etc" - but turning the Chromecast on and off has solved that and as it only takes seconds to reboot, it's not really an issue. Normally this kind of thing would annoy me, but it must be remembered that the Chromecast is still in it's infancy so these kind of glitches are to be expected.
There's only one disappointment for me and that is the performance of Plex which is needed to stream content from your PC, i.e. locally stored video, etc. However, this is not really the end of the world as I can stream through the PS3. Again, it's probably just a glitch and I'm sure that future software updates will address that.
EDIT: I've downloaded an app from the Google Play Store called AllCast which cost me £3. That streams stuff directly from my phone to the television through the Chromecast. It also allows me to bypass Plex and stream media on my network without any stuttering. Great stuff. THere is also an option to play media files directly from DropBox. Although audio streams fine, video streams with sound only. Not a big problem.
The Chromecast is a cheap and efficient way to turn your TV (as long as it has a HDMI socket) into a all-singing, all-dancing Smart TV. My Samsung TV is pretty old now and the only thing I had to do was buy one of these:3D Ready / Full HD 1080p HDMI Switch - flexible 3 port switch | 3 x IN / 1 x OUT | Dolby True HD / intelligent switch- automatic and manual switch
as I only had two HDMI sockets and with the Chromecast three devices. The Chromecast is plugged in and is "on" all the time. When I switch inputs it is ready and waiting to be used. When the PS3 is turned on it kicks in and the switch changes automatically to this new device. Once the PS3 is turned off it goes back to the Chromecast again. Very simple.
One of those rare devices that is cheap, easy to use and has great impact. Can't recommend the Chromecast enough.
EDIT No 2: Anyone know how to install the Chromecast app on my Kindle Fire HD (previous gen)?