Im using a hegen and a pigeon gomini. Hands down Hegen is the simplest in terms of assembling parts, portable too with in-built battery. For pigeon i needed an electrical point all the time.
if single pump.. horigen exqiusiture is best https://shopee.sg/Exquisiture-Single-Electric-Pump-Model-2209MI-i.190634610.5602762110 there are some reviews at fb/ig of ourlittlelamb
I from hegen switch to this BE mini cordless breastpump
Medela
Medela