I use the mini Larabars on longer rides, because I like the fact that they are 100 calories...so no guesswork involved. I also like the fact that they're small and fit in my top tube bag easily and they hold up fairly well in the heat. They definitely are calorie dense in that you don't get much for those 100 calories (literally 1 bite), but they seem to sit well in my stomach. I sometimes will also use the mini Clif and/or Luna bars, as well...I like to switch it up to keep from getting bored with one type of bar.