Those against the use of this technique for piano learning lessons assert that this technique is difficult for some people. People with limited memory retention are at a disadvantage to use this technique. Even if a student is good at it, he may forget some parts of the lessons while performing, and this may have detrimental effect on his overall capabilities of taking piano lessons and play at a pro level.
While you are taking piano lessons, it is important to know what to be memorized. In other words, which pieces must be memorized so that the performance is not at risk. One must be very good listener in order to have larger chunk of piece being memorized with ease. Further, you must try to memorize something which you have started practicing. It shouldn't be other way around - you first memorize and then memorize the same.
You or your tutor must be able to analyze the piece by splitting it into parts clearly identifying the rhythmic, melodic and harmonic units separately. This analysis must mandatorily precede memorizing. Experts also offer this piece of advice for those taking piano lessons - technique of verbal mediation. This technique employs simple procedure - student should speak out the lessons and practice it simultaneously. Memorizing process can be reinforced with the help of visual memory.