Oh getting paired with locals is very cool! I did it a couple years ago, and it was worth it -- but I wish some in my group had been from around my city, Austin. My project ended up shipping (
https://www.currentkey.com), and it was nice to be accountable to a few other people through an important stretch and have regular reality checks. I'd strongly consider doing this again for my next project (a mobile game), especially if I could be paired with locals.
If I had one regret, looking back on the experience, it would be a mistake I made: forming an LLC far before I needed to, largely to be seen as a 'company' by YC. You can (and I'd say in some cases should) validate your project, esp. if you're a solo founder - by launching an app as an individual developer vs a company account. I know YC itself is only interested in companies, but they should appreciate that if this school is open to all -- all people don't need a company to have a profitable project.