This is the best light weight canister i've used on the east side which is approved for kings canyon, sequoia, etc — basically, all of the east side areas requiring cannisters.
when you say the "black barrel" i think you are referring to the traditional garcia model which is like 3 lbs or so. the weekender is an ounce shy of 2 lbs and has more ci. i just used the expedition (the second, larger model made by bearikade) for an 8 day circumnavigation of the kaweah range this summer and it worked perfect. that model is still lighter than the garcia.
the clincher is the price. whew! over 200 bucks. but there is a solution there too. the company will rent you the cannisters by sending them to you a day before your propsed date and then charge you on a per diem basis. parks like sequoia will rent them, but thats the only area to do so– at least that i know of.
the bears were very active this last summer because of the drought. we were bummed rushed by one in the middle of day while stopped creekside. i had my pack off for a second and the bear came up behind me– i heard it as it was 10 ft away, spun around and grabbed my pack, shouldering it immediately. then we yelled and the bear took off. but then it followed the trail and wouldnt get off. we knew the bear was acting very strange so we waited over an hour to let it clear off the trail. it did, but we hightailed it out of that canyon.
last note. if you are thru hiking you dont technically need the cannisters. finally, in the heavey use areas (by both people and bears) there are bear boxes to store food.
hope that helps.