History:
I purchased a Precision 5550 in December 2020. The system never worked (boot problems). I received technical support (service pro) twice at home (the motherboard was changed twice) without success. I was then asked to send the laptop to a center in Germany for repair. No defect was found, but it was decided to exchange it for a Precision 5560. I received an email announcing that the new computer would arrive at my home address on January 16. Nothing arrived and there was no justification for the delay nor any forecast of the future.

Conclusion:
1- Technical support followed a strict protocol. In order not to waste one more minute in understanding the reasons for the original failure (maybe it was just a faulty adapter) we lost a year, two home visits by Support, two motherboards.
2- The management of the machine changeover was disastrous: poor courtesy on the part of the person in charge of the operation, total lack of information despite many reminders.

Bottom line:
As a Dell customer for about 25 years, I have to admit that the after sales service that was the flagship of the Dell brand has completely degraded. I hope the products are not. Anyway the choice of my next computer will no longer consider Dell as the first option.