I'm using Medela Freestyle that was blessed by my friend. Easy to use, double pump and definitely portable (pump itself is as big as your palm)
I have a Pigeon Gomini too, use it when I'm out. I find the suction good for its size. And it's very portable.
The S9 and the pigeon portable electric breast pumps are worth considering:)
I'm using Hegen and a Pigeon GoMini
I heard Hegen or Loveamme famous
Heard Hegen and Loveamme famous
Can consider pumpables!
Hegen or Spectra S9
S9 or real bubee
Spectra s9+