Something we keep seeing: teams wait until their code is "final" before getting it reviewed. Thing is, the bugs that hurt the most usually aren't in the code. They're in the design. If the way funds settle or get refunded is wrong, there's no quick patch for that. You end up rebuilding a big chunk of the protocol. So if your contracts are still changing, it's worth having someone look at the architecture first. Way cheaper to fix a diagram than a deployed contract.