I live in Spain, and Aitor knives are among the better-known and most common knives here. They were a highly-regarded company, a symbol of national quality products and good stuff, until they went down in 2003 and had to close, being bought by a chinese imports company, and changing QC, materials and steels used, production and manufacturing, etc.
Now hey're just a shadow of what they were. The Oso Negro and Jungle King were famous, quality pieces that forged the company's name.
But now thay are cheaper, not nearly as well built, worse steel and construction, etc.
I own several Aitor and would only recommend their pre 2003 models and knives, my favorite being the Aitor botero.
For $100 you can do much better nowadays, and if you can get your hands on an old Oso negro I'd say don't pay more than $70.
Ontario SP10, KaBars and similar brands are much better options in that price range.
That's just my opinion, of course, but it's based on experience with the brand and its products.