Hi don't know the kennel, have only heard of N. Georgia K9 academy here and there...don't know them.
I do have a suggestion though...
Since you are interested in Otto my suggestion would be to contact the kennel and find out about his pedigree (sire/dam) post that here and the pedigree knowledgeable folks could give you more insight about him in particular. They don't have much information on their web page.
Also I noted they said Otto has 'extremely' high play and prey drive. As a first time GSD buyer is this something you were looking for in your dog?
Smitty (rescue) Ilda WGSL 4/28/10 Autumn Australian Shepherd 10/9/11 Stihl Bonafide von Nadar WGSL 3/23/15