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

Input:
I've been using Tripp Lite ISOTEL's and ISOBARs for over 10 years and I love them. They are super heavy-duty, constructed out of metal, and have saved my equipment on more than one occasion. They are very highly recommended to any audio/video enthusiast or professional, as well anyone who just wants to save their computers or home theater setups. Once you use these, you will want to scrap all of your other surge protectors.

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