"...SeaSchool made sure all the paperwork was in order, and is there if you have questions or any problems. CG came in one day to examine all the ID verifications, seems like they did the fingerprinting and the other necessary stuff. They are a stand up professional company, left no stone unturned. I came prepared with my documentation of hours aboard a commercial vessel and they made all the paperwork go seamlessly..."
Professionalism is important, of course, but an outfit like SeaSchool also will make sure your application package is complete and in order. There's also a degree of credibility in that they signed it off. You can do the study on your own, schedule your various tests, etc. But a school will help make sure it all flows. This beats driving a couple hundred miles to a CG testing center, time off work, staying overnight, and finding you can't sit becase some "T" wasn't crossed.