seo plugin for my users

Hi today im looking closi to the avaible wordpres seo plugins

yesterday i whas confince to buy the seopressor here so much good about it

but kow im choosing between this 3

seopressor

Easy WordPress SEO

clickbump-seo

all 3 dont have demos so im asking

wich one is realy the best

come tel me from y experince

thank y