If you're reading this and don't know what a plow plane is, it's a tool used to cut grooves in a piece of wood. Think of the grooves in a frame and panel door, or the ones that hold the bottom of a drawer in place. Normally they're used with the grain, although if you cut the edges of the groove with a knife or saw they can go across the grain. Some (although not this one) have cutters ahead of the main iron to make them work better across the grain.
Where, and How Much?I bought mine from Woodcraft, at this link here. Full retail is $66 no matter where you buy it: Amazon, Newegg, Woodcraft, wherever... it's always $66. It's also always sold by Woodcraft, so there might be a connection there.
What do you get, and What's the Construction Like?You get the body, fence, arms, and five blades, sized 1/8", 3/16", 1/4", 3/8" and 1/2". The sizes are actually Imperial sizes, not metric, so they should match your chisels if you're buying in the US.
Construction is decent, but not fantastic. It's a fairly simple tool: the body has a metal (presumably steel) skate set into it, and the wedge matches the throat quite well. Adjustment is simple, and the fence is reasonably stable.
There are, however, a few minor issues. The first is with the fence: The fence is held in place by what seems to be a serrated piece of metal, with a bolt through it. By tightening the wingnut, you pull that serrated piece of metal up, and it grips the arm. However, loosening the wing nut doesn't actually push it down... it just loosens the nut. A light tap with a mallet (or on the top of your workbench) loosens it fully, though, so it's a nuisance that you'll probably stop noticing fairly quickly.
The other issue, which is a bit more substantial, is with the skate. On the copy I bought, the front skate was ever so slightly too far back, and the back of the iron just barely touched it. Obviously that meant shavings couldn't escape, and so the plane didn't work at all. As soon as it started cutting it would jam. I fixed it with about two minutes of work with a file, rounding off the back corner of the front skate. That resolved the problem entirely. It's possible I just got a bad one, but it certainly indicates their quality control isn't perfect. You should be able to see the issue here. As I said, a little bit of careful work with a file cleared up the issue entirely. If you're planning to take very heavy cuts, you'll want to take off more of the skate, but I took off maybe 1/32" or a touch more, and that was plenty.
Other than that, it's pretty nice. The irons fit well and mate with the rear skate quite well, the wedge fits, and the fence (once you've correctly loosened the screw) slides easily. One thing I did notice is that the arms aren't quite parallel, so if you pull the fence all the way off you'll need to squeeze them together just a touch to get it back on. Not a big deal, and it means the fence doesn't slide around when the nuts are loose.
How does it work?Overall, I'm reasonably pleased. It's fairly easy to adjust, the fence appears to stay where it's put, and the irons seem to cut well. One thing to be aware of is that the fence has no inclination to stay parallel on its own. I recommend using a chisel or setup blocks to make sure you've got it set up correctly.
I would say that, overall, it's not quite as nice as the Sargent-made combination plane I have. It does a better job of dealing with shavings (it spits them out the top, rather than forcing them out the side towards your hand), but it has no depth stop at all, adjustment is more difficult, and I suspect that the fence will eventually stop holding.
But it does do the job, and if you can't afford a modern combination or plow plane, and you don't have the time or ability to restore an old one, it's a pretty good choice.
Final Thoughts?As I said, a modern or restored plow plane will do the job more easily and reliably. But the Veritas Small Plow with five irons costs $275, while the Mujingfang version costs $66. At a price difference of over $200, I'd go with the Mujingfang until I could find a decent used combination plane. It does the job, looks like it will remain reliable, and is definitely cost efficient.
Would I buy another?
That's hard to answer. If I had no plow plane at all, and needed one at a low price, then yes, I would. Or if I needed one to use in conditions where it might be lost or damaged, then sure: I'd rather lose this than an expensive one, and as I said, it does the job.