Your mortgage lender is someone that you should trust and be able to ask questions to. If you do not feel comfortable with them, do not work with them. It is their job to work with you, to educate you and to insure that you are getting the best possible product from them. It is not all about the bottom line.
Did you know that you should have your mortgage lender set up before you actually go and find a home? You do not know how much you can actually get in a home until you have worked with a lender. If you get your heart set on a home that is not in your price range, you are setting yourself up for heartbreak.
