Just purchased TMT 3 platinum and installed the beta 7 plugin. Seems to work really well so far.
The only thing I have noticed is that pressing the "green" button on the MCE remote causes the screen to go black, but the sound still plays. I'm forced to get the keyboard and re-focus TMT then press the back button to exit TMT. I suppose I'm used to pressing the "green" button when watching live TV, videos etc and seeing the little PIP on the home screen.
System specs in my avatar.