I agree. I hit the "up" lever to increase my cruise control speed, and it's either very sluggish or I have to tap it a bunch of times to get it to accelerate. It's usually easier to just pedal throttle up to the speed I want and then hit cruise "on".
Once on, it does a pretty good job of keeping my speed.
Still wish I had dynamic cruise control for those two lane highways and the person in front in their two year old car still doesn't know how to use cruise control and just throttles up and down ±5 mph.