And no, it's not worth reading it. But that's my biased opinion, you should still give it a try and decide for yourself if it's your cup of tea. ^^
Yes, it has a harem. But the mc moves around a lot, so most of his harem doesn't show up often after their arc is over. There's only one or two women with constant appearances.
yes it's really good and funny if you're looking for something like the strongest system it's also going to end cus the author kinda lost interest in it at around 1400 chapter...which is sad... the only he fked and didn't want is the fire princess he didn't forget about anyone else