As a musician, you need to protect your investment. A guitar bag is a great way to protect your guitar and limit the dents and scratches that are common when transporting your instrument. Less damage means longer life for your guitar, which is great news for any beginner or professional musician. How often and what you use your guitar for determines whether you need a case or a bag.
If you are a musician who attends nightly or weekly concerts, a guitar bag is your best bet. The falls are more difficult so they are better suited for long distances. If you are an occasional musician and the guitar is in the closet until the next home party, then a concert bag is perfect. Guitar bag is softer and lighter, making them more flexible and ideal for storage.