They are (currently) giving out the KTTW at check-in automatically. Funny thing is that the one day, out of 8 days, including multiple park hopping...the one day my MB wouldn't work was at the entrance of Typhoon Lagoon and I ONLY had my MB on me. Nothing else. There was a CM there with a tablet that scanned my band and was able to pull up my info no problem. Issue that day was most likely sunscreen on my finger tip - preventing an accurate read. Haha I did carry my KTTW with me, mainly for double-dipping but did have to use it a couple of times. When the La Cantina CM rang up my order wrong - the manager asked for my KTTW card. Said it would be easier to credit me using the card instead of the MB. Also my pin didn't work after I switched resorts (last 2 days) and I didn't want to take the time to get it fixed on my band. The other billion times the band did work although we were riddled with issues.

The issues for us were related to
MDE overall and not specifically the bands.