Have tried manual pump before. Ended up with sore hands. I agree that there are other factors that contributes to the production of milk.
-nutritious food
-Baby latching correctly
-plenty of waters
-No stress
For those who naturally has a lot of breast milk, I think the manual ones should be good enough.
For mummies with less supply, an auto one will be a lot of help as less tiring pumping manually.
I can get mendela free style if i want. Its just that there are some reviews by mummies overseas that the spectra is a lot more quiet and the pump perform quite well. So why not get the cheaper one if the performance is good. (Of course mendela free style is more versatile).
Hence I am researching before buying one. I find spectra is not as common as mendela free style among mummies locally.
Regardless, thanks for all opinions and suggestions given and all that coming in the future. Its good to gather experience from experinced mummies/daddies.