I'm a die hard Whovian and so had to have this on my phone. but it came with several problems, one of which is that I couldn't find a place to attach it to my iphone - a 5s.  it also doesn't work with this model, but I didn't care. I knew both caveats before I purchased it. the charm itself is sturdily made and absolutely adorable. the little tardis spins and flashes bright blue basically whenever the mood strikes it, but it is so cute, you can forgive it everything. wish there was a shut off, because it  spun itself to death the first day I had it. the batteries went dead and that was it. I am buying a box of batteries for it and will treat myself now and then