Gameplay: huge sandbox with it's primary element being economic management, it's quite good IMO but if you're not into management games you will not enjoy it (from your comment I assume you are into that style of game though, so you'll likely enjoy this)
Lewd content: very well written, but there's quite a lot of issues with animations, the 3D models themselves are mostly fine save for some clothes clipping (barring a few catastrophic bugs, but as far as I know these are very rare and only a few people run into them)
Though it's worth mentioning that it's definitely more taxing on your system than most games here, with many users reporting lag problems specially late game (these are primarily linked to the amount of slaves and visitors you have, but can be controlled as the settings menu allows to set a cap to visitor numbers)
Quid pro quo is the dev's new game, though it's still too early in it's development to judge imo