First, these reviews look very very dubious. Some days 5 or 6 people put reviews in for this TV, which sounds very suspicious.
Secondly, it seem to indicate it has Freeview built in but not Freeview HD.
So if you want to watch Freeview HD you would have to buy a Freeview HD box. Or a Freesat HD box to watch it via satellite. Both are free to watch after you buy the boxes.
You can only watch 3D if the signal coming in is 3D, so this would have to be via a 3D Blu Ray player (which you have to buy) and a 3D Blu Ray disk (which you have to buy).
Or Get Sky 3D but I think they only have on channel in 3D.
So this TV is nothing special and will give no nothing over any other "basic" TV.
Save up an buy a TV with Freeview HD built in, and get one from a decent make (Samsung, Sony, LG etc)