Creating safe and fast affiliate deep links directly from a product page is not new, Amazon had offered similar thing to their Publishers too and this had proven to be helpful to many. The CJ Deep Link is easy to get. You only need to open a supported browser like Firefox, Chrome, Safari, IE9 and IE10, double check whether your bookmarks toolbar is visible then drag the "CJ Deep Link Generator" button to your bookmarks toolbar then you're ready to use it.
All you need to do is make sure that you have access to the Deep Link for the advertiser in your CJ Account Manager that you like to promote because there are some advertiser configurations that do not support the use of the bookmarklet yet, as of this writing (Sept. 1, 2013) but the good news is that Commission Junction is doing its best to help them and fix it to offer a wide support for both publishers and advertisers. It's really nice that CJ is able to help their publishers this way, making work faster and easier.
Fore more info, you may visit http://www.cj.com/publisher/cj-deep-link-generator.