One of the things that buyers find the most confusing is how to get a loan to purchase their home, and how the mortgage percentage rate is calculated from lending firm to lending firm. For those who don't speak "mortgage-rate-ese" those forms can be like trying to decipher and understand a foreign or alien language!
While your loan officer can, and should be able to explain many of these strange sounding terms, it's never a bad idea to have a basic understanding of the process yourself, before you even start calling around for rates. Some institutions are more reputable and fair in their lending rates than others, so it's a good idea to check with those who've been through the process, as well as checking for feedback online about them, as to their opinions and experiences.
Here's a helpful article on mortgage pricing: http://finance.yahoo.com/news/mortgage-lenders-price-loans-why-100023002.html
For any other questions you may have about buying or selling a home, please don't hesitate to give me a call.