Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
( a ) we warrant to you that any product purchased from us will , on delivery , conform in all material respects with its description and be of reasonably satisfactory quality . 

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