They are made in Spain if memory serves. Cool designs with decent construction, but generally sub-par steel for the price. I had one and liked it, but the sub-par steel ultimately made me move on.
To be clear, the steel isn't "bad" it's just not in line with the price of the knives IMO.
Edit to add: I'm also a knife nut so my bar is higher then most
The Muela Magnum knife was basically a co-star alongside Pierce Brosnan and Liam Neeson in the 2006 movie "Seraphim Falls".
In all honesty though, the ones I have are basically collector/display pieces with stag or exotic wood handles, and I haven't used them much to actually cut anything with.
I just use a lightweight and relatively cheap plastic handled folding Spyderco knife to actually cut things with when hunting/fishing/hiking.