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 been using this charger for a couple of weeks, almost constantly charging a pair of iphones or combos of iphone and ipads.  No problems whatsoever.  Not sure what the folks who are having problems are doing wrong (though I suspect that they might be the sellers of more expensive versions of 12V->5V converters).

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