I have two of the 2.5 gallon kegs of this style. The price was right, and they work just great.
Apropo of another thread where I learned that pin locks have thicker gauge steel, these kegs seem to be thinner gauge than standard cornies. So they could damage easily. I'm not typically chucking them around though.
I found that the dip tubes in mine were a little shorter than I liked, particularly with the domed bottom (though it is nice to not always pick up the yeast). It seemed like a fair amount of beer to lose in a small keg.
So far, I've had them in use for at least a year.