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

Input:
Unlike the Tripp Lite Ultrablok  previously reviewed by me, this unit actually did prevent damage to the attached equipment during last week's thunderstorm. Lightning destroyed a whole house generator, Sony flat screen tv, central AC air handler and network equipment.  The TV and access point that were plugged into this unit survived intact.  Perhaps just luck since other equipment survived but I am happy with this unit.

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