I'm looking to buy a home in Montgomery County, MD - need advice please!

Hello, a job offer in the D.C. area will require our family to relocate to the D.C. area. We have heard good things about the Montgomery County area in Maryland. Does anyone live or know about this area, specifically on the western side of the Red Line? What are some neighborhoods to check out, and those to avoid? Thank you in advance for any information or advice!