Best Manual Breast Pump?

Does anyone have any recommendations on a manual breast pump? I already have a double electric, but I need something more easily portable I can just throw in my purse or diaper bag. I was looking at the Medela Harmony and the Lansinoh but I keep seeing that the Medela has a leaking problem and the Lansinoh is better for those with bigger nipples? (I need a size 19mm flange). Has anyone used either or both of these?