QuietWalk Plus QW360PLUS All Flooring Underlayment with Attached Vapor Barrier, 6' x 60', Blue

Description says this can be used with mail-down flooring. But nailing down will reduce the sound-dampening. Has anybody used this with nail-down?

How thick is this underlayment?

Will i be fine using 4.2 mm thick click together vinal planking?

Can I use peel and stick vinyl with this underlayment?