No, haven't used it.
Yes, will be replacing when it expires, 'cause I'm just nutty that way.
No, haven't had one long enough for it to expire :)
I do plan to hold on to expired kits for "training" purposes as suggested by our DE. I actually hosted a "care and feeding of special needs kids" class at my house this morning. Me and four other mom friends got together to go over how to care for our son with T1, as well as one of the other mom's daughters who has a life-threatening dairy allergy (no kidding). I showed everyone how to use the emergency glucagon kit, and we all learned how to use an emergency epi-pen. Pretty cool. Shortly after our son was diagnosed, my husband was bitten by a copperhead in our garage, and one of my friends pointed out that if there was ever a serious family emergency, we had NO ONE to leave our son with who would know how to take care of him. She was the inspiration behind the "care and feeding" class, bless 'er.
And, yes, Rufus The Bear With Diabetes is an essential member of our family. Lordy, the wails of grief when he was temporarily lost. Thank goodness we have a couple of back-up bears. BTW, if it ever comes up, Rufus does survive the washing machine and dryer in pretty good form :)