Saw this yesterday and thought it was a decent buy for the price. I currently have a 60cm x 30cm which is a little cramped with the mouse even with a TKL board if I have the keyboard dead centre with the monitor.
Reviews show that it 'can' be packed poorly (folded instead of rolled) so make sure to get an ironing board and iron ready to smooth out those creases.
Price now up to $13.95 from $10.95.
I have a 900x400 version of this. 800x300 probably better size.
Wouldn't advise to iron it, it will melt. Best is to run it under water in the shower and let dry. At least that's what I do when I spilt tea/coffee on mine…