Having evaluated the Elvie Curve breast pump, I don't think that it provides the breast stimulation and nipple suction which I desire.
I have gone back to the Haakaa breast pumps, which I can carry with deep suction on both breasts, and still move around without any difficulty.
There is a bit of technique required in getting the pump absolutely centrally on the nipple. If you don't, you can get chafe and soreness.
But once you get a good latch, it's pumping heaven!