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 . 

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