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

Input:
You would not believe how much more comfortable a cordless mouse feels. I use a computer all day long, and I can't live without this thing.
The pros for the Logitech Cordless:
1. Comfortable to use.
2. Steady pointing. No jitters.
3. Durable: I have two, one at home and one at work. No problems with either for over a year.
4. Nice color scheme (not hugely important, but it's nice to have silver and blue instead of putty beige.)
The Cons:
1. You have to use batteries on this one.
2. The red optical light is on all the time--if your computer is in your hotel room, you might find the blinking in the dark annoying. Seems stupid, but if you travel, this can be disconcerting. Then you have to take out the batteries to keep it from blinking all night.
3. It won't work on shiny surfaces--you need a mousepad, but what kind? Optical mice are kind of funny. Too dark, no good, too shiny, won't work. Supposedly you don't need a pad, but I find I prefer one.
On the whole, I give this mouse a big thumbs-up for comfort and durability.

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