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 have had my Buddy Portable Heater for about 8 years.  There have been some changes from the model I bought, but the overall function is the same.  It heats my living room (15 x 17) real well.  Keeps the overall room temperature about 75F (on the high setting), when it is in the mid-teens to low 20s (F) outside.  The high setting lasts little more than 4 hours using a new 1 pound propane tank.  I have used many 1# tanks at this setting and the results are unwavering.  The low setting lasts about 5 hours (rarely use the low setting).

With just the pilot light burning, a new 1 pound tank will be consumed in about 50 hours.  I only found this out one time by lighting the pilot light and got distracted (not lighting the heater).  Came back to the heater a couple of days later, discovered the pilot light was still burning, and turned the heater to high.  It heated for 5 minutes and quit (empty tank).  I remembered when I lit it and estimated the number of hours.

The only problem I have had is the push-button spark sometimes fails to light the pilot light.  However, after several attempts it will light.

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