Checking by hand will always be more affective then any automated solution. We used Localeze for a while and reverted back to hand checking as it was the only way to be fully in control of all of the citation sites.
The problem with all of these "auto submit" websites is that there is no way that they can properly submit every single thing that each citation site requires. Sure they will most likely get the NAP correct, but many sites ask for different items.
One site may allow you to put up a video, another 5 or 10 videos. One may allow you to submit your logo, but with certain size constraints. How many images can you put on each? What size minimums/maximums does each image have?
Some sites allow you to put pictures of the officers/partners of the business. Many sites allow you to post keywords, but how many?
Most importantly are the categories for the business. Some sites allow you to drill down to very specific aspects of your business and others will ask for the basic category.
When you submit your client's business to these places, you are not doing the best work for your client and it will become evident a few months down the road when they do not get the results they expected to get.