Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
6.1 although we aim to offer you the best service possible , we make no promise that the products will meet your requirements and we can not guarantee that the products will be fault free . 

```
. OPTIONS: ['Limitation of liability' 'Content removal' 'Jurisdiction'
 'Choice of law' 'Arbitration' 'Unilateral termination'
 'Unilateral change' 'None' 'Contract by using'].