When selecting a law firm / counsel for a search fund, what are the types of diligence and questions you might ask?

Understand that:
-referrals can be helpful
-ideally someone with commercial sense who can balance the legal with business objectives and who doesn't serve as an obstacle to getting a deal done
-prior experience and knowledge in Search is quite helpful

What other qualities/skills/experiences do you look for and are there conflicts of interest to be aware of?