Your thoughts on online co-founder match?

Hi!

I've recently matched with a co-founder using YC Co-Founder Matching tool and I'm wondering what you think about starting a new project with someone you've never met in real life.

If you have had this experience in the past I'd love to hear more about it and how you managed to work together and go through the ups and downs of startup-life with someone you've just met.

I came in with a semi-developed idea and he came in with technical expertise.

Any tips would be welcome :)
Thanks