I'd prefer that you enlighten yourself and actually do some research on it beyond skimming the Wikipedia article. Mondragon is a worker-owned cooperative venture that operates in several different sectors of the economy. Pay is set by the workers' cooperatives in the different sectors; the average pay range for all the different ventures is about 1:5--which means the "highest" senior managers get to make about five times what the "lowest" entry-level employee makes. Sure, as some have pointed out, it is "fully integrated into a capitalistic system." The same can be said of the kibbutzim in Israel, and employee- and member-owned companies all around the world. Being a small organization in a larger economy does not change its basic nature from being communistic. Notice the lower case c.Care to enlighten me?
When founded by a young Catholic Priest a few years following the end of the Spanish Civil War (in 1941, as the rest of Europe was in the midst of some minor military conflict...), Mondragon experienced continual disruption by the government and anti-communist elements in Spanish society--as well as anti-Basque elements, and pressures from Basque separatists. The collective has persevered, and succeeded in the modern economy, whereas the shortcomings of state-centered communism became obvious and led to the downfall of the Soviet Union and Warsaw Pact "communist" nations. China has left the golden path of state Communism, although it has had its share of troubles in the process. Others have addressed North Korea.
Communism has been show, by the success of organizations such as the Kibbutzim and Mondragon and the failures of the state-centered forms, to only work on the small scale--what economist EF Schumacher said was "with a human face." These are pragmatic, local organizations--communities--whose members work to improve their collective condition, rather than expecting the success of a few to trickle down to the many others who made success possible.