Google Remarketing

I had quick question has any one here had success with this method? I was going to give it try rather then just hiring seo specialist please give me your input!

Quick info about it
Remarketing is a feature that lets you reach people who have previously visited your site, and show them relevant ads when they visit other sites on the Google Display Network. When people leave your site without buying anything, for example, remarketing helps you connect with these potential customers while they browse other websites. You can even show them a compelling message or offer that will encourage them to return to your site and complete a purchase.

http://www.google.ca/ads/innovations/remarketing.html

its working ok so far for me, but try to get your traffic from another source too not just PPC, like from social media and banner exchange or whitelist network depending on your niche. for travel niche its really good.

its best advantage is lower cpc.

The major disadvantage is: it's annoying - some clients me take it as:

"hey, these guys are every where, they probably invest lots of money in marketing so I should give'em a call"

but, some will take it as:

"I hate these guys, they're everywhere - chasing after me and shit. I'll never use their services".

These days, when almost everybody is computer / internet savvy (kids, teens, old, etc), I think he/she might fit the second statement.

Google remarketing is a great feature. I think most of the people who are using PPC , are ignoring it. But it has paid good ROI for some of my clients.