If there is any worst brand in Tab to buy it is Mercury.
I had bought mercury tab seeing lesser price and that actually costs me a lot.
Got 1 year manufacturing warranty but no value as its services is nil. You get the response of your services too late that it is of no use.
Coming to performance heats up the device too soo., hangs frequently . Range of feautures is not so high. Apart from style I do not find any good feautures. So it is a complete waste of money and I strongly suggest NO to this mercury tab.