I just saw an infomercial about it. It sounds good but for a 12 oz bottle at $29 I wonder how long it would last if we have to go by this?

How much is right for my hair type?
Short or fine hair or medium textured hair: Use 16-24 pumps
Medium length hair or medium or thick textured hair: Use 24-32 pumps
Very long hair or very thick/coarse hair: Use 32-40 pumps