I played the demo on a whim while looking through Kickstarter VNs, and I'm so impressed. The demo is a solid 2 hours with polished art, story, and music. Even the loading screens are gorgeous (I love Quentin's sinking school!), and there's so much attention to detail (e.g., Izzy sitting far away at the start but sitting a little closer after extended conversation). If the demo is this good, I'm confident the devs will release a smoothly running game.
Since it's spring break for me, I ended up playing through the demo twice. And I made a Kickstarter account for the $25 pledge because I really want beta access. Personally, I hope this game succeeds because I'm already itching to discuss it, and I'd love to see a fandom develop for it. I would definitely recommend trying out the demo!