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