What can I get from guitar lessons in person I can't get from lessons online?

Taking guitar lessons offline or online have both their pros and cons. It really depends on what kind of students you are. There are persons who do good if they study by themselves and there are those who learn faster if they deal with actual coaches. But my personal recommendation is to get the most out of both. It will be good if you learn and read beginner lessons available online, start feeling your guitar as you learn, it's actually surprising how some online resources are very detailed that you already learn how to play the basics without knowing it. At that moment, you can choose to find a coach and your lessons will be easier, easier for the coach to teach you, and easier for you to learn because you are not new with the lessons already.

the best instruction would be to find an instructor :p try craigslist, you would be surprised how many people advertise their services. I found my piano teacher that way. you get first hand experience and knowledge, someone to show you what you are doing wrong and to keep you on track. to keep you on the ball and pushing you forward. edit: what the hell is it with craigs list that people always give me thumbs down?? it worked for me. jeez.

Shortcuts and any questions you have can be answered right then and there.

It depends on your personality and style of learning. Some people learn well from videos and books or just have a natural inclination to play the guitar with the proper technique. Some people might remember things quickly and accurately. These types of people may not benefit as much from classes or lessons. A teacher can help guide a student toward material that is a suitable challenge for them. He or she can correct technical problems when necessary. A teacher can also quickly answer your questions. I think it would be very difficult to have a good understanding of music theory (Jazz or Classical) without an instructor or without discussing the topic with knowledgeable people. I learned to play guitar with the guidance of a teacher, and I learned alto saxophone without. It probably took me twice as long to learn the saxophone than it would have if I had an instructor. The benefit for learning without a teacher was that I saved thousands of dollars $$$. If you are looking to sign up for lessons in a classroom environment, and it costs nothing, then it might be worth it. It is hard for a teacher to guide a large class of music students, but there is plenty to gain in that environment. If you are looking to take private lessons, keep in mind that it can be difficult to find a teacher who will take you in the direction that you want to go. It's not a bad idea to try a few teachers out and then make a decision based on your experiences.