I have refused any Sony product for years because of their warranty process. If you think you have a claim, you ship the product to a certified center. There are few of them, and you cannot become one. If they find that the issue is warranty, they fix or replace, then ship it back. If they find nothing wrong, they ship it back and you pay both ways. I had DOA laptops that came back as " unable to recreate" . It wouldnt boot, at all. This was at about a 10% rate. Also, if it failed in use, the hard drive of this model was under the keyboard, and we had very proprietary stuff on it. If we removed the drive, the warranty was void. I had to build in a > 10% failure rate to the budget so we could just pile up the failures and cannibalize for parts.
I dont know if it has improved, but the cost of their stuff isnt worth the risk for me to find out.