CF-30 MK3 Ram Upgrade ... 4GB to 8GB

I'm looking to upgrade my cf-30 mk3 to 8GB and discovering the price jump from 2gb sticks to 4gb is significant...

Anyway, after reading others posts, I am considering this:
http://m.ebay.com/itm/New-8GB-2x4GB...MHz-200pin-Sodimm-Laptop-Memory-/331194740964

Any opinion / advice? Ought to work, right?

Thanks,
Aerik