I need an entry level mountain bike!

Good Day!
I need a new bike!
Is this a good deal?
http://www.bicyclesonline.com.au/2013-polygon-xtrada-4-0-mou…

I checked ebay, so for the price this is pretty decent.
It comes checked and tuned up and I can assemble the rest.
$500 is the limit for me.

Thank You

All the Best