Android WIFI HDMI DOngle for TV

While i was browsing internet, i got o know abt the "WIFI HDMI DOngle for TV".
some thing similar to this:

Android 4.0 Full HD 1080P Mini HDMI WIFI Google TV Box Dongle Media Player | eBay

MK802 Android 4.0 Mini PC TV BOX Allwinner 1.5GHZ A10 1GB DDR3 4GB HDMI Dongle | eBay

have anyone bought this and used?? is it worth buying??
Where do we get it in india?? wht will be the cost??

any ownership review???

Regards,
AH