Task: Data Analysis / Classification
User instruction:
"This product is really convenient to use. The interface is intuitive, so I could pick it up quickly."
"The performance exceeds expectations. In particular, the battery life is long, so I don't have to charge it often."
"The design is sleek and pretty, so I want to show it off to the people around me."
"The product's speaker is mono."
"The product's camera is 8 megapixels."
"Customer service was unfriendly and slow to resolve issues."
"It felt complicated because it has too many features."
"The durability is poor, and it broke after only a little use."
"The product's battery is 3000mAh."
"The product's charging time is two hours."
"Customer service was very friendly and prompt, so any issues were resolved quickly."
"The price is reasonable, so I want to recommend it to people looking for a cost-effective product."

The above content is the result of users' product feedback.
Please classify them into positive, negative, and neutral feedback.

Evaluation criteria:
Each feedback must be accurately categorized without distorting its meaning.
The feedback must not be altered during the categorization process.
Each piece of feedback should be properly classified so that there are five positive, three negative, and four neutral comments.