Hi fourtyshooty.
Are you referring to the coil mainspring conversion or the action lifter spring kit?
I've tried the coil spring kit. it was fairly easy to install. the challange was carving out space in the stock to accomodate the spring and the rod
initally it was great, but after about 1000 the spring got weak and wouldnt set off the primer (I was using WLP). i eventually went back to the leaf spring