DS started with adeks and then aquaadeks -- he never seemed to mind it; however, I wanted to hurl -- thought it smelled nasty -- like when someone has a really bad sinus infection. We used an oral syringe instead of the dropper. When we first started using it, when DS was an infant, we put it in a nipple from a bottle, added a little bit of orange juice and ds would suck it right down.
When we started doing sinus rinses on DS when he was 4, he began to give us problems -- figured he could finally smell and realized how nasty it was, so we switched him to Source CF bubblegum chewables. I've heard some people have had much better luck with Vitamax drops.