Instruction: Assess the user's sentiment in the provided review and select the appropriate sentiment option from the list as the answer.

Input:
A beautiful, high quality mat, with the densest foam you will find. Yes it's thick, but it's more "supportive" than cushiony.  If you are a large person, you'll appreciate this feature.  Your knees won't "sink" into the floor, and your balancing poses will feel more controllable.  The added length and width of the 71" mat feels just right to my 6 ft frame.

I salt-treated the mat as instructed, but it is still very slick once my palms and feet start to perspire.  You will probably have to repeat the treatment a couple times, or keep a "slippery when wet" sign on it.

There was no unpleasant smell at all when the new mat was unboxed.  A nice surprise.

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