Hi, I have been using it since launch, have reviewed ~100s-1000s of profiles, have talked with ~50-80 people, did a try-out with 2, for 6 months each. (Background is: I am a technical founder with 6 prior startups, 2 of which were successful; still want to build something, looking for good ideas, and great execution people)

I'm still actively looking for high-quality cofounders to join, and will take anyone who jumps the (high) bar I've set that is required to make a startup a success. However, it is extremely frustrating to work with the site for a mix of cultural, and UX issues reasons.

Specifically:

* Establish a culture of people sharing both their ideas, and the progress they made so far on the project. If the "idea" section is empty / "will discuss on a phone call" / NDAs, that's a no-go from the start. You might want to add a text in the "idea" section of the profile builder, that _not sharing their idea_ is very very bad, and they will get passed on for that reason.

* Search, and a way to look at "everyone who wants to work on X". There are several usability issues with browsing people one-by-one: for one, there are some startup ideas that are very timely right now, and I want to know everyone who wants to work in that area. For another, I can't know if a person I've passed on ~10 months ago haven't pivoted into something more interesting. This is not a sector-specific selector, rather a full-text search for every profile who has specific keywords; with results displayed in a list, similar to cofounderslab.

* Having a profile checkbox, and ability to filter for high-quality founder signals: have built a startup before, have made it profitable, have sold things in the same product category he's thinking on launching a new thing in.

(These are off the top of my head, will edit, if other things come up)