i have been to the detail king seminar and it was very good. the first day theywent over what all you need to start up your busniess licinsee your busness name and all that. also how to promote your business. the second day they go over a full detail on a car and they split you up into groups working on differnt cars. i bought there biggest detail package they have it was like 9000 i think but i got a ton of ****. there chemicals are some of the best you can use they have never let me down. now there polishes i do not like i use other brands for things like polishing and so fourth.