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my trusty Avent, it has seen me thru 4 babies, I hardly used it at all with Maya, used it to express for the gremlins full time for 10 weeks and am using it now to express milk for another wee bub whose mum can't breastfeed.
I don't have any experience with the manual Medelas, but I hired a double electric Medela when I had the gremlins and ended up preferring the Avent manual as the suction was very temperamental on it. I've used them since when various kids have been in hospital and found them much the same.
I've definitely got my $100 worth out of the Avent!