Fitbit handled the situation rather poorly. There were hundreds of users complaining about the problem in their community forum, and it took months for the company to initiate a recall. What annoyed me the most was that during this process, they claimed that there was nothing wrong with the product, and that if there were one, it was due to a nickel allergy. I know, with confidence, that I am not allergic to nickel. This was still their conclusion when they posted the final voluntary recall [2].
I now have a minor scar on my wrist, and I can't recommend any of their products. This isn't because they're bad but how badly the customer service was during that period. I hope they can recover from that slip up, but I don't see myself buying anything Fitbit anytime soon, especially with so many other nicer fitness bands being released.
[1]: https://www.cpsc.gov/en/Recalls/2014/Fitbit-Recalls-Force-Ac...