Having never sold a house before, I may have a very simplistic view of real estate (perhaps ignorance

I have found a place that will guide you through the whole process for about $1,400, fixed. These guys provide the support, sign for the front of your house and signs for home opens, but most importantly, advertise on the websites listed above (and a few others) - they are registered real estate agents. I have 2 quotes from real estate agents, both pretty much 11k fixed price. So nearly 10k savings.
What are your personal experiences selling a house without an agent? Did you get a package like I described above? Who with? The main thing I am not sure about is the bit after an offer is accepted - does the settlement agent take over from here?
Any responses are appreciated!