Instruction: Analyze the user's review text and determine the overall sentiment expressed, then choose the corresponding sentiment option from the provided list (A: very positive, B: positive, C: neutral, D: negative, E: very negative) based on the identified sentiment.

Input:
I recently purchased the Koolatron Voyager Cooler to place on the tongue of our pull behind motorcycle trailer. It functioned well but being exposed to the direct sun it would only maintain an inside temperature of 60 degrees. I am having an insulated cover made for it which I hope will improve it's performance. Operated inside it maintains a 40 degree temperature  which is very acceptable. We traveled 1600 miles with the cooler on the trailer tongue in 90 degree heat and it did as well as could be expected and kept our meds at an acceptable temperature.

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