Island of Lust [v 1.0.4 extra] is a really good and very much enjoyable game with a few shortcomings.
Let’s start with the narrative and writing, which might be rather average. But if you like fantasy settings give it a go for sure.
Gameplaywise it's a sandbox without too much grind. I've seen far worse in other games. The dev also included in-game hints on how to progress, which work well in the beginning and mid-game, while in the end game, it doesn't provide that much help any more. You have to find some scenes and in-game progression on your own later on. But at that time, you should be fine and know your way around on Island of Lust. Island of Lust also features some mini-games, which all can be skipped (auto-win) by the way for those, who hate mini-games or don’t want to do the same over and over again.
The game’s engine is renpy, which in fact is a good choice, although the rollback button might cause bugs sometimes. Concerning bugs in my play-through I encountered very few and nothing really game-breaking. Once in a while after a scene and some text skipping the game crashed back to the main screen, but it wasn't much of a problem, even if you didn't save for a while, because you can always load the renpy autosaves. After the reload the game continued normally and also the scene didn't cause a crash a second time, if you didn't skip anything this time. So just be aware, that extensive skipping and rollback might cause a mess from time to time.
The heart of this game are the graphics, which are top notch. The renders are of high quality and all sex scenes are animated and even include different perspectives, you can switch. This game really features a lot of animations and some very hot npc's like both Elf girls, the witch and the tavern wench, which were my favorites. Optically this game is A+!
Unfortunately the end seems to be rushed and some npc’s lacked content. For example the librarian girl doesn’t have much interactions except for one repeatable sex scene and I also hoped to have more interaction possibilities with the queen later on after the two initial scenes. So a few more content updates before reaching the end, would have made this game really awesome. (By the way I managed to train the beautiful elf slave girl to S-, before the end game kicked in, but didn't bother to get her to S+, before the good ending. I also avoided NTR. So I might have missed a scene or two in my play-through. )
All in all a really good game and well deserved 4 stars. With some more content and without the rushed end, I would have given 5 stars. Anyway Island of Lust got enough content to very well enjoy it.