They still haven't fixed the coil whine? I've heard complaints about that since the first Dell XPS. Their forums were filled with them. Most reviews mentioned it. They used to even do motherboard replacements to fix it. Youd think their number one priority for their next-model power supply would be to eliminate that. No other manufacturer seems to have this issue.

Just got a new XPS 15 yesterday.

First, all the Linux installers I tried couldn't see the SSD, like, at all. I had to disable RAID support in the BIOS (I still don't understand WTF is RAID doing there provided there's only one disk). Then, no matter how I tried, it just refused to boot from UEFI. Then, when I enabled legacy boot in the BIOS and finally managed to make it boot into the system, it hung up when switching to graphics mode, screaming that "watchdog detected a hard/soft lockup on CPU". When I finally managed to have X running, it's apparently running on the CPU, and xdriinfo says there's no direct rendering support. It took me nearly 2 days to get kind-of-but-not-really usable system. I still can't adjust screen brightness (other than in BIOS...)

The last time I had this much trouble with installing Linux was back in the nineties. But hey, the HiDPI display is indeed beautiful.