Bounce permitted me to determine which luggage storage was closest to both my apartment and my journey (in this case cadorna station). The locker system there worked well, from: 1 initial information about dimensions of each locker (we needed two medium and two large lockers for our luggage) 2 information about how many of each were available (plenty when we booked the night before travel) 3 the cost (to compare to other bounce storage rooms). I was sent instructions (to my bounce app), which were easy to follow for both opening and closing the lockers. We left our apartment at 10am, caught a taxi to Cadorna station, easily found the storage lockers in the ticket office, had the bags stored and were on our way by 10:45am (longest delay was in the traffic jam outside the station). The day was ours. We wandered back after lunch, opened the lockers, then were on our train to Malpensa in plenty of time. We didn't need to reopen the lockers between dropoff and collection, but had the flexibility to do so if we wished. Overall, a fantastic luggage storage experience.