Unbranded Android tablets (NATPC, Tabtronics, Momo Ployer etc)

I've done some searching on amazon and I see a lot of favourable reviews for these Chinese made android tablets which come with ICS. Prices too are quite competitive at 1/3 of android tablets of the same screen size.

Are these tablets worth it? I want to try a tablet out though I don't want to shell a lot of money but want ICS as well. Suggestions welcome