I usually put zero interest in YouTube reviews, but there are a couple of decent people I do pay attention to. Of those people, the UFO (and UFO2) seems to be the best sounding out of all Bluedios. And when reading through the comment section of many of their videos, a lot of people seem to agree.
I have avoided the UFO in the past, because:
- They are expensive (for a Bluedio, or at least a Bluetooth headphone in general). I would never spend over $100 on a Bluedio. I primarily use and follow Bluedio for my daughter's sake, so she can have decent bluetooth headphones with robust build and non-Beats prices. I don't consider Bluedio audiophile grade, so I personally use them more as a fun toy - modding, donor shells, etc.
- The "many drivers" thing seem gimmicky to me. If it was the holy grail of full size headphones, you would see every big name manufacturer doing it - Sennheiser, Beyerdynamic, Sony, Philips, etc. Sure, there are a FEW that had ONE headphone with a dynamic plus tweeter (original Beats Solo and 1More H1707 to name a few). But none of them were 6+ individual dynamics like Bluedio did.
- The #1 reason I have avoided it is reports of WORSE sound when wired. This means that the electronics portion of the UFO is doing all of the required magic on the multi-driver headphones - sound tuning, amplification, etc. Who knows if there is even a crossover inside? And when the circuit board dies (as happened with my T3+), you are screwed.
Anyways, if I ever see a UFO or UFO2 on sale for really cheap ($50-$60 max), I might give them a try.