Hands free pumps

Just wondering if anyone out there has tried the Willow or Elvie hands free breastpumps. I will soon have a 15 month old and a newborn and would really like to try one of these two pumps in order to simplify things a bit, but would like to hear some opinions on them first. Which one is better/easier to use? For those who have used the hands free pumps and a traditional pump, did you notice any difference in milk production from one to the other? TIA!