Bought these a year or two ago, went through two pairs in three months because of how fragile they are. The second pair I only used while sitting still at the computer, and they still went out in the left ear after a month or two. Just a warning. Excellent sound quality, but yeah they don't last long.
Also, not sure if this has changed, but the warranty it comes with from Ostry is pretty much impossible to use, and the website the QR code linked to doesn't really do...well, anything. Also, trying to contact them is essentially useless. These issues may have been remedied by partnering with Massdrop though.
Despite all of that, I am still gonna buy a pair, because they sound so god damn good while they last.