I bought a 250 foot spool and one end of the spool was loose when I opened the box. I tried to reattach and use like normal, but the end immediately fell off when I tried to pull wire.
It made this job VERY frustrating, and I could not get the wire to come cleanly off the spool. I had to fight all 250 feet off of that spool - untangling and untwisting the whole way.