| Courtesy and friendliness of the sales or customer service staff | | | | | | | | | | |
| Representative’s availability | | | | | | | | | | |
| Representative’s knowledge | | | | | | | | | | |
| Reliability of returning phone calls | | | | | | | | | | |
| Complaint resolution | | | | | | | | | | |
| Responsiveness to inquiries | | | | | | | | | | |
| After sales service and follow up | | | | | | | | | | |
| Technical service | | | | | | | | | | |