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

Input:
The resistance bands by Black Mountain can't be beat. I've tailored my workout to include all the exercises for a particular door position each day. This eliminates the need to switch positions between sets! Thanks Black Mountain!

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