As the others have said, talk to a few; then go with what feels right. Buying a home is about family and emotion, so choose an agent you are willing to share that with. How do you find the few to interview? It can't be that hard, we're everywhere! You can interview those you meet in the open houses in Bernal, or go to the company websites and find those who specialize in the neighborhood.
Good luck with your search, whomever you choose!
A) Daily updates (email or by phone)
B) Weekly showings (every weekend?)
C) Provide advice for Lending choices
D) Provide referrals for Inspection Professionals
E) ....You fill in.....
Look for someone that will be there with you every step of the way and will be working for you directly as a buyer agent. Have them explain what is involved in that. Feel comfortable with whovever you choose and good luck!