I dont have anything for or against King although the Cessna Ground school program I bought at my flying school was made by the Kings
I actually started with the online version from American Flyers which is not that bad. it mixes lots of video featuring 2 instructors with a stage background that is visual mostly with text.their private pilot written test pdf(downloadable with the online)is very thorough, mixing visuals and text
since then I have also used ASA and Gold Seal
ASA online is ALL text. not a video anywhere. if you like all text(I dont)go with ASA.their book 2016 Test prep is not bad.
Gold Seal is almost all visual and Russ's way of presenting and the visuals I like very much.the examograms which go along with Gold Seal feature lots of visuals and are wonderfull!!