Hm. Pretty limited in content so far, although it seems very high quality, but I'm not really sure what this game is actually going to be. Judging by the blurb, I'd guess that's still up in the air.
Waifu hub could be an interesting idea although it's kinda limited at the minute. Interact with the other character using your or their pre-selected animation aaand that's about it. Not sure why there isn't an option to just select a pose ("coming soon" I'd guess?). Kinda reminds me of what Bondage Club does with their characters. Though, frankly, the story light(/absent) "just do sex animation" stuff isn't really my cup of tea, and currently this has even less window dressing than that did.
Character-creation wise, I do like the options on offer, but a few more body types would be nice (and clothes, but I get this is early days and there's likely more coming). I'm guessing it was easier to just include the model from the first game and add a couple of clothing/hair/(boob?) options. Though, that default... *chef's kiss*. Short skirt and thigh highs should be mandatory with that build.
The demo adventure level worked well (access it on the upper level by the laptop, the sparkly thing), and I really liked the animations (the [full?] nelson one especially). Didn't have any problems playing it on the online version, even with the limited character angles. Only real complaint is that you don't really get long enough with the animations to appreciate them properly, if you've picked the "right" one. It's not too hard to work around though - if you want to see one specific animation, just find a soul where it's not the right answer.
Overall, looking forward to see more. I'm usually more into story-driven stuff but this seems high enough quality that I want to keep an eye on it anyway. I'm hoping there will be a bit more substance (at least in a minigame or two) but if not, oh well.
(I'm only not posting this as a review because I'm [expecting/hoping] most of this will be out-of-date soon enough)