Instruction: Given the user's review, identify the user's sentiment from the listed options. Answer using one of the options.

Input:
I am a adult beginner learning the cello, and I must say that, this has been a great tool to carry in my handbag. I have used this coupled with the callus builder attachment. As I cannot carry the cello wherever I go, this enables me to strengthen my fingers on the go while travelling on public transport. This is turn makes my practice sessions on the cello are more efficient, as I focus more on the notes not trying to press down the string with all my might.

Options:
A: very positive
B: positive
C: neutral
D: negative
E: very negative
Answer: B: positive