I prefer the Gels to the Bars. I just find the Bars are too hard to eat while riding and sit heavy in my stomach. I like the GU Gels & the Hammer Gels. I find that the GU go down easier, but the Hammer's seem to give me a little more power (but that is probably mental). They are nasty and there are only a handful of flavors I like. Also, the I am big fan of the Clif Gel Blocks. That are easy to pop in as you ride a long.

In regards to the arguments over 2 hour rides vs. other rides & what you need/don't need. It's your ride, spend it however you want. If you want to suck down a gel every 15 mins & are enjoying it; go for it! It's hard to the group you are riding with, the terrian, the pace, etc. To each his own. On a two hour ride, I normally carry 2 gels but don't take them unless I know I am doing some serious climbing, then I will have one. I do normally have Gel Blocks pack open to just to snack on depending on the pace. Also, I like to Cytomax in my water bottle whenever I ride. I just like it a whole lot better than water.