One on one training helps to elevate your basketball skill level privately by an experienced coach. You may practice in an environment without any other distraction, comparison, isolation, embarrassment and abandonment.
 
One on one training fits your own pace. You have no worry about undergoing training that does not fit your existing physical condition. You won't waste your time learning the fundamentals or doing drills that you are already good at (unless you wish to further improve them). The private coach may monitor the schedule so that you can learn faster or in a pace that fits you.   
 
One on one training provides better communication between the coach and the learner. You can ask the coach questions anytime you like it and get an answer till you feel satisfied. This clears out all those misunderstandings or issues caused by insufficient time factor.
 
One on one training ensures your improvement is on the right track. The coach will utilize computer equipment to show you the correct form, analyze your move with speed camera, compare your move with the pros, do testing and evaluation from time to time. The coach will use every tools in order to help you achieve your best.  
 
One on one basketball training is just an alternative for basketball lovers to improve their skills. There are many ways to achieve the same goal. Somebody can choose to learn through a book or video. Our basketball pros in the 60s have no internet, no video but they still achieved great success in basketball. What is the most significant factor for your great success is your will and desire to achieve the best you can.