I haven't shot the Guardian yet but I have been shooting my Commander quite a bit. I think David might have touched on some key points and I will illustrate why.
First, draw length definitely plays a part in the overall impression of the draw cycle of any given bow. I had a gentleman down at the shop try my Commander last night. The draw lengthis set at 30.5 inches and he typically shoots a 29.5 inch draw. When he drew back the bow I could see him struggling a bit with it especially as he got it back farther in the draw cycle. The bow was set at 61 pounds and he typically shoots at that weight for indoor target and 3D. After putting a set of 29 inch mods on the bow he showed decidely less difficulty in completing the draw cycle. His only negative comment was that the bow felt heavy compared to what he was shooting but that may have been my choice of accessories.
Second, the draw cycle definitely has a different feel to it. Using subjective words to describe it is difficult. It isn't harsh in the sense that there are bumps in it or that there is a harsh drop off into a sharp valley. It does go to peak draw weight relatively quickly and stays there for a majority of the draw cycle thus producing the "heavy" impression everyone is mentioning. The transition to and from peak weight though is very smooth in my opinion. Just like everyone else though I would prefer a "smooth mod" option on the new cam design come next year. Having a choice is always nice.