Instruction: Carefully assess the user's review for any strong expressions of sentiment, either positive or negative. Based on your analysis, select the most fitting sentiment option from the provided list as output.

Input:
I bought these binoculars for my trip to Costa Rica in March. For my Ecology course, I would be doing observational research on the local avifauna (birds). Since I would be doing a good amount of birdwatching I needed a pair of binoculars. After seeing the expensive price tags of in store models, I searched Amazon. I wanted a small pair that I could use to see large distances away. Bushnell Falcon 7x35 provided that and more.

Pros:
1) These binoculars are tough! I took them hiking through the mountains, up and down streams, and through thick forests and jungles. They are still in perfect condition.
2) The instant focus feature is great! With the slightest touch of a knob I could focus on the far away bell bird and then to the close by viper in seconds!
3) These binoculars work great! I could see far away creatures with ease. I even was able to take a few pictures through them with my phone camera. This really helped with identifying the birds if they moved out of sight or flew away.

Cons:
1) They were a little heavier than I expected. When I received it, I thought it would be hand sized and lighter. However, they weren't all that heavy. If I could carry them around my neck for 15 hours everyday, you should be fine.
2) Watch out for the neck straps! Sometimes they would slide off of the binoculars and a fall could damage them or you could lose them.

In conclusion, these are one of my favorite Amazon purchases. You will love them.

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