Well Don, I honestly cannot comment on their miter saw because I have never bought one of those. I have bought several things from HF over the years and have found that most are not worth carrying home, but some things can be a bargain. I bought a set of digital calipers there a couple of years ago and they work well. I bought a half a dozen claw hammers one time there when they were $1 and they are actually better to use than any other hammers I own or have used. About the only powered thing I've bought there that made it past the first couple of uses is a portable band saw. It's bearings are rough, it growls and makes all sorts of odd noises, but it does still work.
On the cut off saws though, I can show a pic of the one I still have on a shelf in my barn. What I said about it is no exaggeration. As weak as it is, all it does is transfer metal from what you are cutting to the abrasive wheel. Then the wheel will not cut. For an abrasive wheel to cut you must have enough power to have the cutting wheel spin enough to actually wear away as it cuts through steel. Unless you are cutting something 1/16" or smaller, the HF cut off saw just doesn't have enough umph.
Besides that, the cheap China and Russian wheels they sell actually explode if you use them on a cut off saw that has any power. I bought several spare cut off wheels with the saw when I bought it. After I bought a DeWalt DW871-R chop saw I ended up trying those cheap wheels and had 3 explode while using them. Fortunately I do always wear safety gear when using metal cutting equipment and was not injured any of those times. However, I feel that 3 for 3 exploding when no other quality wheel has ever exploded on me is enough proof for me. The remaining cheap wheels got tossed.
I do quite a bit of metal cutting. I have an oxygen/acetelyne torch, an oxygen/propane torch, a Hypertherm 1250 plasma cutter, and the DeWalt chop saw. I probably use the chop saw the most because it does such a great job on just cutting steel. I basically do not ever cut anything small enough (seriously, about the size of a pencil is all the HF will competently cut) to ever use the HF saw. Besides, instead of $350 to $400 for a high quality DeWalt saw, one can now be had for under $150. Here is an example
DeWalt DW871-R