This will be among the handful of (5 or 6) games I rate that receives a solid, perfect 5.0 out of 5.0 rating.
Sisterly Lust is everything you could want in an incest friendly, harem-driven visual novel. The characters are some of the most unique and lovable I've seen in AVN's, all have very refined and well thought out personalities and feel like real people. This heightens the satisfaction you get from winning them over and landing in their beds.
Most importantly, though, I don't think I've ever seen a more perfect trio of sisters... the game also sports some of the hottest MILFs I've ever seen and I don't think there was one girl in this game who I wasn't physically attracted to.
Perverteers writing style is extremely fluid, imaginative, and fun. The game puts you into a slew of wild situations and lighthearted drama. His renders aren't perfect but they're up there with the best and some of the visuals are mindblowing.
Finally, before I move onto the minor cons... I need to mention that this game will smother you with harem, pregnancy, water sports, corruption, domination, creampies, and risque... all of which are optional... so if any of those things aren't up your alley you don't have to worry: you have full control. All of these things combined, in my opinion, makes this one of the best adult visual novels ever made, and it's what every AVN developer should strive to accomplish.
The game is not without very minor drawbacks, though... such as a small handful of blurry renders, or the fact that it doesn't have animated sex sequences... though I must admit that even without animations it has some of the hottest lewd renders I've seen: it makes you forget there aren't animations, and therefore the lewd content in this is far preferable to most animated games. These drawbacks weren't significant enough to dock even a fraction of a point, however, so don't let it turn you off. Oh, I forgot to mention... this is a completed game with an amazing ending and hours and hours of content, so you're hurting yourself by not playing it right away.
Nice job, Perv, can't wait for the next one! Thanks for the inspiration.