Their blades seemed to be priced similarly to some of the higher end knife makers such as Jerry Busse. For hand-ground blades, these prices aren't unreasonable. But they do cost more than most people who aren't knife nuts are willing to pay.
They're made of 5160, which is a really tough carbon steel that holds its edge. They grind mostly from 5/16" stock. That makes for an almost indestructible knife, but IMO, is really not the most ideal thickness for many of their designs. They saber grind most of their knives as well, so the designs that have the narrower blades will end up with some really thick cutting edges that just won't be very slicey. 5/16" is much more appropriate for swords and wide-bladed choppers rather than narrow fighting blades. Again, IMO, their daggers and fighters need either full flat grinds or 3/16" stock to be optimal.
My biggest gripe with their blades is that some of them just don't seem to have been thought out for maximum efficiency.
For example, take their M-5 Fighter. Trailing point; saber ground; straight G-10 handle; finger choil; 7 1/2 " long blade; and 5/16" thick. Comes with kydex sheath. $275
This is billed as a fighting knife. Yet, thanks to the heavy stock and saber grind, the M-5 is going to be a heavy knife, and probably too slow in the hand to make a great fighter. Fighting knives have to be fast in the hand.
Now, take a similarly-sized knife of similar design, the Becker BK-5, designed by master bladesmith Jerry Fisk. Trailing point; full flat ground; straight G-10 handled; finger choil; 8" long blade; 3/16" thick. With G-10 scales and aftermarket kydex sheath, $195.
Even though the Becker is a production knife, it is still a much better design. Very light and fast in the hand thanks to the distal taper and full flat grind. The handle is a better design, and the edge geometry is amazing. This thing is razor freaking sharp. The BK-5 will glide through meat much easier that the thick-edged M-5 will, and it will get there faster. The funny part is, the BK-5 is intended to be more of a competition and camp knife rather than a fighter, yet I believe it would make for a much better fighter than the M-5, based on my own experience with thick, saber ground blades over lighter, thinner full flat ground blades.
See what I mean? The Miller's designs just don't seem to have been refined for each knives' intended task. I could go on about some of their other designs, but who's got the time?
Some of their handle designs need to be reworked a little, in some cases a lot. They have mostly straight handles, and many of them don't have pinky hooks, which means chopping and slashing with them will be harder to do than if the handle was curved a bit to add leverage and had a pinky hook to help retain your grip on a swing. I also don't care for the finger grooves on some of their designs. I hate 'em on Glocks, and hate them on knives.
I'm not trying to knock the guys. The Miller's blades look very hardcore. They're tough and made from good steel. The guys who have used them say you just won't break them. I like some of the Miller's swords, but I'm not really a fan of their knives. There are other makers who grind similar knives that I like better for less money. Hand-ground blades are expensive, so if you don't want to pay their prices for what are essentially very simple designs, then the Beckers, Esees, Scrapyard, and Swamprat knives are probably a better choice.