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

Input:
We use these to line the pans when we bake things and they work wonderfully and don't impart any silicone smell like other baking sheets do.  After a while though, they do begin to get kind of gross looking from things that have spilled over and baked into them.  I wash them in the washing machine and technically they are clean, but they look sort of terrible, but they still work great.  A great savings over expensive parchment paper

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