I used one of those 100 dollar types a while back, and they are hard to beat. I was looking at the offerings in the economy prices and ordered a shinto but was intrigued by the surform after the reviews above. picked up a new blade for the surform and spent some time with it, and it worked good on softwoods crossgrain. harder woods not so well and along the grain, not so well either........ maybe I just got a bad blade. the half round worked best.
As mentioned above, I've built hundreds of bows of many kinds of woods with Surforms. I can easily see how the pull-style Surform might feel useless at first. It bites the wood, especially hard wood, only at specific angles. After decades of using the tool, I still find that after a longer break from using it I'll have to play a bit to find the sweet spot tilt that starts to eat the wood, the back end of the blade mostly engaging the wood, I think. Also, the Surform seems to "feed itself": after you've opened the wood surface with it, subsequent pulls have much more effect on the now-specifically ridged surface. It takes some strength and stamina, as hand tools do. But it does work, really well, and allows you to fluidly switch from working one limb or the other to eyeballing the taper etc. I never use the tool cross-grain, BTW.
Chinese copies of Surforms are around, and they are truly useless, even fresh out of the package. So that might be a factor in some people's crappy experiences with these tools.
Tuukka