We used them last month on a 7 day trip to AKL. We loved it. Several coffees and several sodas (and an occassional hot chocolate!) each day made it well worth the cost. Places are easy to find to refill them and all the machines worked well. The only issue we came across is you can't refill too quickly. I chugged down a soda once and then went to refill to take back to my room and I had to wait a minute.