Yes its stable enough to use it daily, first hard reset your phone on windows phone 8.1 OS then add Microsoft account and stuff, then install important apps which you need like windows insider and then 2-3 apps which you will be needing, then unpin all tiles which are created by default on windows phone 8.1 then go to insider and choose fast ring and install it, then pin your favorite tiles and use the apps which you've installed.