Even though the sizing on this site isn’t accurate, I was able to find a support group to help me get sized accurately, and ever since I haven’t had any issues with my Willow 3.0! I am able to pump without being away from my hospital floor for too long, and can even carry out the patient care duties of my job while pumping. I 1000% suggest this to anyone who is in the market for a wearable pump. It is well worth the money.