I played around UUKI just an hour ago from setting up a community...Creating Spaces, Creating grouped spaces, modifying some community settings, modifying profile settings, adding a blog, debugging for facebook and these are my observations so far:

1. UI is pretty simple...UX can be improved a lot...especially when creating spaces where you need to hit save first before the space or group space is partially saved, got me confused...I was used to a field greyed-out once the field is filled, giving you the idea that you successfully entered data.

2. When sharing a (private post) to fb (also after debugging)...the linked post will fetch the profile image of the user and use it as og image... it will not assign the cover of the post (which is oftentimes askewed) nor any image from the post.

Also, if you copy the post link, and try to open it on a browser...if the space where the link is derived from is public..then the link will work on chrome...if the space where the link is derived from is NOT PUBLIC...the link will not work and it will give an error...I hoped that in this case it would just show a page which says this post is private and sort of invite the link visitor to sign-up in the community.

3. Setting Up cover image for the community only works for light images, heavy images do not upload...The cover should be measured properly otherwise, whatever image you put will most likely be askewed depending on how your image dimensions are as it covers the whole placeholder.

4. When you have set up a custom sub-domain (e.g subdomain.uuki.live) and try to access that domain to do a sign-up...the sign-up page...still has the UUKI logo in it.

Also, once you have signed-up, there is no confirmation/success message, it just blinks back to the sign-in/log-in form.

*wink*

5. Inside your profile, there are options to create a blog and a video gallery..

The profile section is not yet we established. The blog section allows you to create a blog but when you open the blog...nothing appears

Also the video gallery doesn't work...I tried to put a youtube link...and it just blinked after saving. **another wink**

6. Creating Posts.

The WSYIWYG editor allows videos, text, headings, bullet points, hyperlinks and even iframe embeds...cool..

Unfortunately, it is too cramped in a tiny space to do a medium-length post or a long post...maybe there is a way for the devs to make this experience better...
You can also add a cover photo to any post...cool...quite nice...buttttt, the cover photo looked "stretched" once I published the post...meanwhile inline photos have a good aspect ratio (so far).

Likes and comments are available and you can see stats about it.
7. Moderation: there are banned words...i like it...reminds me of Sour Grape LTD here in Appsumo...
8. I didn't dig too much in Analytics but it is quite decent..
9. There's API and webhooks, this is good for course creators or digital marketers.
It's a good product! I hope it gets better!