Pros - I lost weight, mainly body fat.
I feel more energized, and my mood has stabilized.
No afternoon crashes.
I can eat too much some days (all Primal, tasty foods even sweet treats) and don't gain weight.
I got into exercising regularly and really liking it.
I'm in good health overall. No colds or any other issues. Used to be sick a lot - upper respiratory stuff.
I really enjoy great tasting foods, all guilt free. Eating is no longer just going through the motions to sustain myself.
Body composition looks much better compared to in the past when I was watching calories. No more skinny fat.
I sleep very well, 8+ hours.
I'm sure there's more, but can't think of it now.
Negatives - Having to cook all the time. As much as I like cooking, it just gets old at times.
Experiencing binge eating episodes at time, so far without any negative results.
Still working on the last few vanity extra lbs. and trying to figure out how to get rid of them.
Obsessing over my macros and pre-planing my daily menu every day.
I suppose most if not all of the negatives could be blamed on me, not on the Primal lifestyle. All in all for me the pros greatly outweigh all the cons.