I'd probably give this 4.5 stars if I could, but 5 is fair enough. I liked it a lot.
GRAPHICS: All top-notch. Despite varying art styles between animations, the mini game, and the usual dialogue scenes, it all meshes very well and is charming and sexy. More scenes (no animated blowjob!?) and a little interactivity would be great, but what's here is really good.
GAMEPLAY: Gets a little repetitive, but that's kind of unavoidable with this genre. The missions are a neat diversion and put this above most other trainer games I've tried, though it does get a bit too grindy here and there.
One unnecessary source of tedium was grinding. Hypno earrings were so important, but I almost never got the ingredients except saltpeter, meaning I had to alternate buying valuables and cooling agents, then go and craft. There should be a button to just buy gadgets outright for the cost of their parts when I don't have any ingredients, and keep crafting as just a way to use ingredients when I do.
It can also be hard to tell sometimes what actions are going to move time forward. Frustrating to do something, intending to set the spies to jobs after, and have the game bump you to nighttime. Not a big deal, though, since there's no time limit I'm aware of.
WRITING: The protagonist is fun to play as, and the girls are charming and have nicely distinct personalities from each other. There's also a good sense of progression, both with their relationship to the MC and their gradual increase in sluttiness. There's a few weird inconsistencies, but mostly just with the job/side dialogue. (For example, spying on Alex she talks about blowjobs, but then in a story scene later she doesn't know what one is). Not a big deal, and less jarring than some other games, where the main story progression itself feels out of whack.
MISC: Tracking down all the pics and clothes is a pain. Not even sure if I'm missing clothes, or if there's just random intentional blank spots. Some kind of hint system, at least post-game, would be ideal. At minimum there should be Xs or something on deliberately blank slots.