Is a bottle warmer ever worth it? I have heard such mixed reviews...I am planning on breast feeding and once I go back to work MIL will have to warm my possibly frozen supply. Perhaps it is just new parent paranoia but I can just forsee her nuking the heck out of it even if we instruct her not to. I know she would be into the bottle warmer since she loves a good gadget and I will be honest in concept it sounds better to me than schlepping a pan out and heating it on the stove or holding the bottle under water...any thoughts ladies?