Does anyone have any experience with renting from medela ? Im wanting to express some milk to increase my supply but don't really have the upfront cost for an electric pump and i don't want to buy one that doesn't work for me. Is the Medela Symphony Plus a good model ? It says its the one used by hospital's but I've looked at the manual Harmony one which has good reviews too, im currently using a Haakaa 150ml pump but struggling to get it on tight enough to actually suction anything out