I recently switched to Cytomax from Heed for that 3-6 hr run/bike range. Seems better so far. While riding/running, I could handle the heed until about 4 hours or so and then couldn't stand the taste. The smell of it afterwards made me nauseous. I switched to Cytomax and am having better results. For those who use it, what are your favorite flavors? I started with Tropical fruit but haven't tried the others and want to order one more container so I can choose by mood.