The DVD instruction videos are very helpful. I watched them a couple times each before i started training and they gave me a HUGE leg up. It will help you make the most of each hour in flight. You will find that the DVDs will pay for themselves easily very soon. I would definitely recommend the ASA DVDs as that is what I use. They are not as comprehensive as a textbook, but it does explain things much better. Besides, $100 is nothing compared to what you will spend flying. If $100 will make or break you flying privately, I highly suggest you find a cheaper flying hobby such as Light Sport/powered parachute/etc.
same I love these types of DVD's. I had to listen to john and martha for a week for my instrument written. Studied for a week and took the Instrument and CFII. Gonna by the Commercial ones next week. Gonna start my single and multi commercial here soon.