I think the Restop bags are way better than the WAG Bags. They are bigger, come with more TP and a wet wipe. I don't have the smallest ass in the world and it's pretty to squat into the bag to hit the target. No mistakes yet. I can't comment on the smell since I don't have that particular sense. In other words, I'll carry the full bags of poo if you carry the rope and rack.
Those were the brand offered at the Indian Creek kiosk last winter. The only problem w/ the design is that the bag that you go into is much larger than the hole in the bottom of the bag w/ the chemical is, so you end up going on the side of the plastic bag and then needing to knock it down into the hole. This isn't a big deal except that everything that stays on the bag fails to make it down to the chemical, so it's not as rosey as it might be.