Great, now all my devices can share the bandwidth and reliability characteristics of a stoned boy scout trying to send smoke signals with a flammable blanket!

EDIT: and the less said about pairing difficulties the better.

EDIT2: From the downvotes it seems that many people have had a radically different experience from mine, which is good, because mine has been awful.

    HTCOne-Dell: 1MB file will transfer ~50% of the time, pairing took several tries. 
    HTCOne-MBP: complete no-go, doesn't even pair.
    Nexus6-MBP: paired first try, works reliably at a blazing 100kb/s.
    Nexus6-Dell: doesn't even pair.
    Nexus6-Fitbit: takes minutes to download a day's activity over bluetooth classic, stalls out completely 50% of the time. BLE doesn't seem to work at all.
    MBP-Fitbit: requires dongle, synced once, has had 100% failure rate ever since.
    Dell-Fitbit: requires dongle, 100% failure rate.

Compare to USB which delivers tens of MB/s in bandwidth with 100% reliability and no pairing process (RIP plug and play). I love the promise of bluetooth, but in my experience it has consistently fallen spectacularly short of that promise in every regard.