***Update: I had originally given these 3 stars per below, but after more time I've updated it to 5... The battery life and wireless range is phenomenal, both are so much better than my previous Corsairs! I was charging those daily, after only about 4-5 hours I'd get low battery warnings, but I almost never have to charge these, it's insane how long they last... and the range is almost twice what I got from the Corsairs, I can roam all over and never lose sound! So just be sure to tweak the sound a bit as I noted before, and maybe about $15 of the price is simply for the brand name, but I'm liking these more and more with time!Initial Review:Ok, I'm really torn on these... First things first: myself, along with many others, think the sound quality is horrible out of the box! People that say they sound great I don't think have experience with more expensive headphones and are probably moving up from $30 cheapos...First thing: After scouring Reddit and some trial and error, turn off all the special sound settings (like DTS and advanced settings) and move the bass to +7 and the treble to +4. After I made this change, the quality was much much better!I previously had Corsair HS70s for two years and HS80s for two years, but I hate the iCue software Corsair uses, it's a ridiculous resource hog and constantly has issues. So for me this is actually a mild downgrade price-wise as you read my pros and cons, they're primarily vs my Corsairs:Pros: Incredibly lightweight and very comfortable. Battery lasts absolutely forever (I had to charge my Corsairs daily; the Logitech can go for days!). Sound is adequate once tweaked. Volume tops off at a low level but as a 45-year-old who is a huge music fan I can tell my ears aren't what they once were, so they're doing this for your protection. Software is "light-weight" and unobtrusive.Cons: If you're mainly listening to music, spend a bit more on Corsair or Steelseries or even a purely audiophile set. You'll be disappointed with these. They're lightweight but as a downer feel a bit flimsy. As I said, sound is terrible out of the box imo.I really struggled with the number of stars to give! For the money, if you know you're getting a lightweight pair of headphones with great battery and no hassle, they're not bad at all. If you want more quality to your sound, go elsewhere however. A little bit more money can get you a way better sound.As for Logitech in general, I was tired of having three different programs (keyboard, mouse, headphones) so also got a Logitech mouse after remembering one I loved years back. The brand does feel overpriced for the quality they provide, as a general rule, as if they're capitalizing off their brand. I'm ok with both these and the mouse, they're fine, but for just $20-40 more each I'd say try one of the newer brands if you haven't before. The Logitech stuff just feels cheaper overall than the price would suggest but they get the job done!