I have tried most pinging services, the thing I didn't like about Lindexed is Lindexed only lets you drip for 7 days so if your doing 1000's of links you, could be sandboxed.
If you put in 7 links it will automatically divide it over that 7 day period, so you will be pinged and it will drip once a day. But, since there is no control, if you put in 7000 links, it will ping 1000 a day. That can potentially hurt your site. I just didn't like the lack of control. Linklicious you can set to drip 60/day and it will do it indefinitely. Also, lindexed only stores your links for 7 days, so when Google comes back to crawl it *POOF* Your link is gone and that is no good.
I recently started using linklicious and Nuclear Link Crawler and even did a case study with both of them.
http://www.blackhatworld.com/blackhat-seo/black-hat-seo/401110-case-study-link-building-comparison-chart.html
Linklicious unexpectedly out significantly outperformed Nuclear Link Crawler on every keyword. I chose both of them because I thought they would both do about the same and wanted to use them against a control that didn't use a pinging service and was surprised to see how well Linklicious performed over another pinging service.
It was easy to set up, easy to use and performed really well. My vote is Linklicious but more so, would be for you to try both out and pick the one that you feel works best for you.
