I have become somewhat skeptical of Facebook and social media advertising.
Initially I found it was cheaper than Google Adwords and provided more profiling power. At least initially it appeared effective.
However despite dozens of clicks delivered in a very short space of time, after tracking conversions I have found that it has been about 1/10 as effective in conversion than standard banner ads and Google Adwords.
So the overall value of Facebook advertising, at least that I've found, is minimal.
This is a shame as it seemed like the platform had plenty of promise. Perhaps this is due to the type of advertising and the frame of mind of consumers using social media.
I have, however had success with Facebook Business Pages where your customers can become fans of your business. This has worked well. Perhaps the two could work better in conjunction than a standard Facebook ad. All the same though, I've been slightly burnt by my Facebook advertising experience.