Harem hotel is excellent. It's a sandbox with a basic gameplay loop that allows the player to take a variety of actions. These actions involve interacting with girls through story events to increase relationship and unlock new sex scenes, upgrading the hotel to increase your income and unlock new sex scenes, and training the girls in their rooms to increase naughty statistics and unlock new sex scenes.
The only con to this game is the initial grind but I believe you can overcome this using cheat mods. The first bit of the game requires you to head into the city and deliver booze in order to have a starting income stream. Once you update the hotel and build the bar, money is no longer an issue and the grind disappears almost entirely. The only grind from that point is to increase sex stats for the girls like submission, sluttiness, lust, etc but that grind comes with high quality sex scenes so it's not really a negative at all at that point.
What makes Harem Hotel so excellent is the character writing. These characters are extremely well developed and have a lot of depth which is revealed the more you get to know them and interact with them. The game treats the girls as actual human beings with real motivations, fears, and interesting back stories, rather than simply sex objects. This has the effect of making any sex scenes much hotter.
To make things even better, each girl has extremely lengthy storylines with a lot of events. Things progress, change, and the girls go through character arcs that are satisfying, and in some cases, quite emotional. I actually felt moved by some storylines and that's really rare for a porn game. I have almost never felt emotionally touched by the character writing in a game like this but Harem Hotel managed it.
Even more impressive, Harem Hotel manages to write a harem situation that actually seems believable within the context of the game. The writing manages to straddle the line of believability with a large number of realistic characters that are conflicted but open to sharing one man. This might also be because it's not a black and white, open and shut issue, there's some conflict over the sharing among the girls, but the fact the game manages to make a harem a realistic situation within the context of the game is extremely impressive.
The sex scenes are fully animated with physics and they look great. The scenes are very nice and better than many, many, many other games. The quality here is top notch.
The girls visual design is exceptional and I think again the quality here is far superior than many other games. There's a wide variety in body shapes and looks from petite to extremely curvy. As someone who is not a fan of the massive, unrealistic melons you sometimes find in porn games, I really appreciate that this game has some girls with more realistic and smaller breasts. But if you're a big tiddy enjoyer, don't fret, because Harem Hotel still has you covered.
There's a city to explore outside of the hotel but it's still under development and there's not that much content in the city at this moment but it's promising and I'm excited to see where things go with further development.
Overall, Harem Hotel is a truly top notch porn game with amazing characters, outstanding visual character design, fully animated sex scenes with physics, a satisfying and rewarding sandbox, and hours upon hours of content already in game and ready to explore. I've played for eight hours and I still haven't finished all of the content Harem Hotel has to offer. Highly recommend.