new to the site questions about leveling kit

i just signed up to this sight today and had a few questions about the ready lift leveling kit>> i called a few four wheel drive places that specialize in lifting trucks and i asked if they sold or installed leveling kits and they told me that they dont sell or install leveling kits cause of the fact that, they rip the cv boots in the front end>> my question would be is howe many people have the leveling kit on thier hoe and if they have had any problems with it??