My experience
-Great combat
-huge mob and boss diversity
-pretty sure replay-ability will be insane as with POE 1, but only time will tell for sure
-good build diversity, which I expect to increase with more classes and a broader passive tree

Things to keep in mind
-if you are new to path of exile games plan on spending some money on additional stash space (this is the only feature that I believe is recommended as an additional cost if you play this game for awhile)
-slower pace than poe 1 (to me this is a plus)
-less loot drops than poe 1 (your screen won't look like a christmas tree) for me also a plus
-passive tree is different, less diverse and a lot of surviveability is no longer available in the passive skill tree, not sure how I feel about this but for the amount of fun I'm having this is a non factor for me
-same dark gritty feel that we all want from GGG
-with the diversity of mobs and bosses, some bosses or rare mobs going to make you feel op or weak depending on your build, I believe this is the cost of diverse boss fights but most feel well tuned

For way less than diablo 4 we have been delivered a much better arpg

My experience -Great combat -huge mob and boss diversity -pretty sure replay-ability will be insane as with POE 1, but only time will tell for sure -good build diversity, which I expect to increase with more classes and a broader passive tree Things to keep in mind -if you are new to path of exile games plan on spending some money on additional stash space (this is the only feature that I believe is recommended as an additional cost if you play this game for awhile) -slower pace than poe 1 (to me this is a plus) -less loot drops than poe 1 (your screen won't look like a christmas tree) for me also a plus -passive tree is different, less diverse and a lot of surviveability is no longer available in the passive skill tree, not sure how I feel about this but for the amount of fun I'm having this is a non factor for me -same dark gritty feel that we all want from GGG -with the diversity of mobs and bosses, some bosses or rare mobs going to make you feel op or weak depending on your build, I believe this is the cost of diverse boss fights but most feel well tuned For way less than diablo 4 we have been delivered a much better arpg