Yeah Medela Mini very efficient, I hv been using it for one year. Try to buy a second hand one if you have budget limitation either from this forum or at Yahoo (there are many unsuccessful BF moms :cry: , what a pity for them). You should be able to buy one from $300-$400.
I use Medela Mini as well, it's very good. I used NUK before, but the motor broke down in the third time. Highly recommend Medela. You can buy the second hand motor and buy the "laba" separately, only HKD44 from the agent.