Currently there is the same model (MBP 2.53Ghz) with better specs for the same money just above the listing you asked us to look at:
http://store.apple.com/us/product/FB471LL/A?mco=Nzk3MDMwNQ
http://store.apple.com/us/product/FB471LL/A?mco=Nzk3MDMwNQ#overview
The hard drive is 320GB vs. 250GB. (Both spin 5400 rpm. 7200 rpm would be better.)
The L2 cache is listed at 6MB vs. 3MB
And the amount of memory on the graphics card is listed at 512MB vs. 256MB. Call Apple and confirm this as there is two descriptions for graphics memory.
Yes, Apple products cost more, but they work well and the time you save more than makes up the difference. Also, any problems I have had, were resolved by Apple quite well.
It looks like a good deal. A much better price than my new MBP ten months ago.