I will begin with an one sentence summary: A poor man's Patlabor with tits and lesbian sex instead of good character dynamics.
For those of you who don't know what Patlabor is, here is a fuller review.
I will swear in this review because face it, anyone reading a review on this hentai should be an adult.
Just as Patlabor seems to have taken one cue too many from Shirow's Dominion Tank Police to be considered mere coincidence, Tokio Private Police seems to have taken one cue too many from Patlabor.
How about a dedicated redheaded cop with high mecha affinity and not much of an appetite for
anything other than the hardware she pilots?
Though I have not seen much hentai as of now, I am well aware of the trope that hentai is a lustful thing that uses all the laziest and crappiest plot devices in the book (especially rape) to set up sex scenes as quickly and clumsily as possible. This hentai isn't one of those, it actually makes moderate sense for the most part (not to mention all the main relationships aren't rapey), instantly putting it several levels above the majority of hentai. However, in the end, it is still a retro hentai and we all know just how shittier retro hentai is.
Many characters in this ova are already in relationships, thus dodging the awkward bullet of needing to justify how they got together in the first place. It does mostly revolve around taking advantage of our heroine's inexperience and letting her experience some action ( ͡° ͜ʖ ͡°). I have to admit, our heroine's character development is even a tad bit romantic! Apart from the sex scenes which are mostly vanilla and include hetero, lesbian and gang(rape) pairings, there are some mecha (or more like wheeled quad tank mech) combat scenes. Obviously I enjoyed the latter more. If you get off to retro hentai sex when far superior modern hentai exists, you're an idiot.
One last note, apparently the jurisdiction of the private police is restricted by law to the point where they cannot stop a gang rape happening right in front of them when off duty. Could have potentially been an interesting dystopian plot theme if the anime was developed further? Well since no more of this hentai was made; its pretty stupid as it currently stands.
Now Patlabor was one of the best looking TV shows of its time, the sheer fluidity of movement and consistency of the technical details in its art is one of the many subtle things that makes the show godtier.
Tokio Private Police has none of that, its art and animation is above average for a hentai; which means it's still on the low end of 90s Ova visual quality.
Also on the low end of 90s Ova is the soundtrack. Smooth jazz plays during the sex scenes; enough said.
If this anime wasn't a hentai, that would not have changed my rating for this anime. The characters all follow your 90s police/ military slice of life stereotypes, the humour isn't that funny and the art design and action scenes are mediocre at best. All of this makes for an extremely meh ova. At the very least, the sex doesn't detract from the anime but it certainly isn't good by any means.
In the end, I don't see any reason you should watch this anime unless you're obsessed with police animes (like I am). I'm just glad the main character of a hentai doesn't get raped for once.