What do you like best?
Landingi is fairly good at setting up SOMETHING quickly, meaning if you need just a page for email capture or whatever else, it can be created within minutes. With a little extra time, I think it can look pretty good. Also, customer support to get an SSL cert was great.
What do you dislike?
Landingi is not easy to fully customize and lacks full screen background images (as far as I can tell). It's not as simple or as pretty as other tools such as Squarespace or Wix. Additionally, it was initially confusing to me trying to setup an alternate landing page for my site; I created a separate landing page which was assigned a new link, and I could not link my old domain to it, even when I tried to deactivate the existing page.
Recommendations to others considering the product
If you're looking for really beautiful, simple customization like Webflow, Squarespace or Wix, you may be disappointed. If stock (and somewhat generic), quick landing pages are what you need and you want to quickly deploy A/B tests or multiple pages, I think this is a good option.
What business problems are you solving with the product? What benefits have you realized?
I needed a simple website up (just to have something up) and was able to get a landing page with a simple form put together in just a few minutes. So far I'm not sure that there has been a big benefit, because I didn't really *need* a landing page, I just wanted *something* up temporarily.