I used both. I did notice darkening of the leather, but since it was water stained I didn't mind and at least it was nice and even. I also feel like the conditioner left the handles a bit sticky, but I think that might change with time and use. If it doesn't I may try the Lovin My Bags stuff next time. I also bought the Magic Eraser I am still too scared to use it. Not sure I ever will.
I also used an organic makeup wipe on the canvas, and it removed a few of the spots that were on the bag and cleaned it up. Then I wiped the residue off with a damp cloth. Interiors I cannot fix at all, but I can always stick a purse organizer in one if the inside is too grody.
Also, I noticed on my mini-Ellipse that when I polished the zipper, I got Brasso residue on the fabric part of it and it had turned a little white. I read up on how to remove Brasso from fabric and one of the suggestions was to use Dawn dish soap, because Brasso is petroleum-based and needs something made to remove waxy products to get it off. Since Dawn is made to cut through grease, it supposedly worked, and since I was at the grocery store at the time I picked up a little bottle and applied it with a Q-Tip to the cloth part of the zipper, then left it to soak for an hour or so. It seems to have worked!