I bought it and would say it's worth it only if you really love Skyrim and don't mind sinking another 20+ dollars into the game. I noticed there are a few new hairstyles and they added farming (unless that's a newer creation club item I didn't notice). It's no more buggy than usual, but I have had issues with kill shot screens where the NPC movement is very static, like t-pose frame-by-frame flipping end over end instead of being one fluid motion. Haven't noticed any issues with mods use either and I have over 100 installed.
i bought it, i think its only worth the rebuy if you love love the game. if you are purchasing it for the first time, sure, get the anniversary edition, however i dont think it changes the game very significantly. the in game modding capabilities are nice, but unnecessary.