Hey Christa
I have the Medela Harmony, I used to struggle to get milk to come out when I used it, but I am now acustomed to the pump and all i have to do is think about pumping and I leak.
I know quite a few people who use the swing and love it! infact I want to go out and buy one tomorrow (to use on the plane, instead of carting my double pump on) but DH says no more pumps (I have a PISA and a Harmony)
Electric pumps are much more efficent at emptying the breasts.
I say go for the swing