A:AnswerIf your Garmin charger is dimensionally the same as the Apple charger, it will lock into place. This charging mat does not come with a watch charger. It only comes with a holder for your factory charger to cradle.
A:AnswerYou have to provide the actual watch charger which is one if the cons of this charger. So if a fitbit charger can fit in the circle holder provided to place watch charger then it should.
A:AnswerYes and no I think it depends on thickness of case one of my phones have a thicker case and the charge goes on and off where my other phone has thin case and charges with no problem.
A:AnswerYes it is. As I learned the hard way make sure you give your Google pixel time to adjust it's adaptive charging settings. My Samsung registered the charging mat immediately