Nothing beats being an apprentice or student to a great guitar teacher and player. But it can be expensive, inflexible and time consuming. Obviously the cost goes up as you take more sessions and the lessons will cost you more that your guitar just a short span of time.
The advantage of modern technology is the availability of guitar tuition software. You can select which lesson you want, how long you want that lesson to run, when and how you want to take the lesson and most specially you get the benefits of professional guitar lessons with less costs. It is still not the same as seeing professionals do it in front of you, but it does get the job done.
With guitar lesson software if you ever forget something you can always go back over it. If you are looking for the alternative way of learning you can check out the various guitar lesson software available. This site will help you decide which guitar lesson is best for your current level, style and taste.