I survey pump on the go. Try spectra9 , cimilre f1 and sunny. For me, Sunny suction quite kuat. not for me. Breast sakit even with level 1. spectra 9 , cimilre f1 suction soft and bunyi pun tk kuat. Spectra 9 a bit pricey for me exceed budget. So i amik cimilre f1. Pump on the go die ada bnyak free gift. So dpat cooler bag, ice pack, cimilre conversion kit untuk handsfree, and storage bottle. So berbaloi.