If you are interested in visual novels...
If you are fond of sci-fis,especially the ones where the characters travel through the universe and explore other planets,or enhance their power by applying genes and prostheses to themselves...
If you like long,epic stories showing the author's mastery of skills, at the same time offering you abundant possibilities to explore...
If you admire a badass(but likable) main character...(of course you have other options)
If you don't want to be troubled by genders and sexual orientations while reading plots about love...
If you are a crazy doppleganger lover like me...
THEN WHAT ARE YOU WAITING JUST DOWNLOAD AND PLAY IT BEFORE I BEG YOU TO DO THAT
pros:
1.The whole story is epic.Long enough to absorb you into the texts,vivid enough to let you feel that all the character are alive in reality.As for the texts about combats,you would feel like thrown onto the battleground,watching.
2.The data like HP and damage is well-balanced.You can enjoy the game all the way without worrying about losing interest or being beaten hands down(which often means you have to do repetitive work to enhance the character).
3.There are few chances when you have to "go outside the story"to do something.For example,the action to decide how the main character looks like is also part of the story(you look into a mirror and you see yourself).So do the choice of mc's sexual orientation,etc.
cons:
1.The CGs seem like AI generated.I think they are acceptable enough but if you examine them thoroughly you will find them unreasonable,at least some of them.(If they are actually not......Please just ignore my words)
2.There are still some flaws in the plot,especially where can be altered according to your mc's attributes and combat actions.For example,sometimes characters would call the mc "him" while you set mc as a female or an asexual.And alien bugs' nest will run away if you"scare it away".
3.If you'd like to collect all the trophies,you have to kill everyone in your way in a game.I'm crazy about collecting all but I hate that.Killing people I've vowed to proctect and AIs who means no harm to me is disgusting.
Though there are flaws,I can say it's one of the best visual novels I've enjoyed.
p.s.I'm not a native English speaker so please pardon me for any language mistake.I played the game 2 years ago and wrote the comment now,and I don't know if the game has been updated.