This scraper was good for getting the finish off of larger areas, like corners, that we couldn't get the sander into. We hadn't bought it with this particular job in mind (P gave it to me as a Christmas gift for refinishing furniture), but it turned out to be exactly the same width as our floorboards. This was very convenient--it's very sharp, and I discovered the hard way that if I tried to do two boards at a time, I was liable to put a serious scratch into one. The scraper required a good bit of strength to use effectively, so I left that one for P.
Mostly, we used a really low-tech solution: a folded piece of sandpaper left-over from the random orbit sander. 80 grit was good for removing finish, followed by a quick polish with 120.
The difference between the before and after pictures is fairly subtle, but it was definitely worth the effort. (Yes, the baseboard molding in this room is at carpet height, so elevated off the floor by about 1/2". Yes, this is a problem--we can see under the boards and into the gaps along the wall. No, we're not in any hurry to do anything about this, for reasons that will become clear later.)
Finally, P, being the meticulous guy he is, used a putty knife to scrape the worst of the finish out from between the deepest of the remaining bevels.