I agree with Kemmrich.
There's a lot of people out there taking advantage of aspiring songwriters. The internet now makes it a whole heap easier to investigate the legitimacy of these people.
If this was me and money was involved, I'd run a song or two past a professional songwriter/performer for a second opinion before committing myself to anything. One such person is Craig Bickhardt. He will give you detailed feedback on songs. He's a Nashville songwriter and has had a few number 1 hits. He knows his stuff. I regularly have songs critiqued by him and found his input very valuable. Be blunt, ask him specific questions, e.g. if it's worth getting demos done, etc. His site is...
http://www.craigbickhardt.comOnce there, you'll need to follow the
resources for songwriters link.
One of the toughest things that faces us songwriters is the ability to be objective about our own work. I always get at least five professional opinions on any of my songs before I even consider putting them in the demo queue
Good luck with your songs

Noel