Panerai Radiomir Black Seal

My automatic Panerai Radiomir Black Seal, bought a little over 2 years ago, stopped occasionally. In my country there is no technical service and they charged a lot to send it to the United States. Taking advantage of the fact that I would be in NYC, I looked for a technical service in Manhattan and Manhattan Time Service appeared as experts in Panerai. I took it, they observed it, they determined that it was necessary to change a couple of pieces (strange in a practically new watch), and they offered me to repair it in 3 days for a price of USD 900 (!!!). I accepted. After 3 days I went to look for it. The watch has been working well for 5 days and I hope it continues like this. I do not dare yet to rate the quality of the service. In MTS dare to open a Panerai and repair it, but unlike the official technical services, are unclear in the diagnosis, do not give a detail of the work done, do not return the replaced parts, do not explain how they solve the sealing issues (it is a watch for 100 meters deep), but they are fast and give a one year warranty. Jacob is a tough businessman, he has an explanation for everything, but I would have preferred to get a concrete answer to what was described above.