I’m very impressed with the Willow especially after reading so many reviews about leaks. I did mess up the first time I used it by not turning it over afterwards for the 8-second release, but it was completely my fault as I dived in without reading or watching the directions. I promise if you watch the instructions provided in the app and online, you will have no leak whatsoever, at least for me, I don’t have any leaks. I do exactly like the video and it’s been working every time. I use it in the car, I use it everywhere. Of course I don’t bend over with the reusable containers only the bags, but they also tell you that in the directions and in the app. I also didn’t realize it does not come with the reusable containers it only comes with the bags. Not a big deal, just order the reusable containers. It comes in handy especially if I have a busy day I can use my reusable containers, then use the bags later if I don’t get to clean them (just have to order additional tubes—where the milk flows through). My liquid has been pretty close to accurate every time I pump. The app is so convenient as you get an idea of how much you produced and it helps with keeping a log.