The school is legit but with a catch for the unaware. A finished degree comes with a transcript, can be apostilled, and can be verified on their partner university's website, so it can be used for things like immigration to certain countries. Unlike many schools, which would restrict a business Master's to people who have a Bachelor's in Business Administration or the like, this school also accepts people of any Bachelor's degree subject. I have taken related courses from another school in another European country and the content was similar. The ENEB courses give ECTS (European university credits), which theoretically transfer to the same subject of classes at any European university.
The catch: As you are studying topics including Business Management, Project Management, Human Resources, International Taxes, etc, you get the equivalent of a European "workforce Master's" instead of a "research Master's" (in the USA most people don't know the difference, and in the fields the ENEB business school is offering the distinction normally doesn't matter). The former is a degree intended for hopping straight into the workforce or getting promotions within your current career, and you can't use it for certain protected/restricted job types in Spain (such as lawyer or public school teacher). The latter is intended as entrance to PhD studies and an academic career in research, and gives access to the mentioned protected job types in Spain.
Note that if you require a Foreign Credit Evaluation (FCE) in order to get a job in the US (most people reading this will never need to as they do not need a work visa and will not work in a restricted job field), certain FCEs evaluate foreign 1-year Master's as well as workforce Master's poorly. If you are so inclined, you could theoretically transfer your credits from this business school to a European university and get a two-year research Master's there which would enable you to work in the restricted job types in Spain, or which would get a more favorable result from an FCE.
After you pay on Groupon, you Email the school with the code you received in the redemption section and they get back to you with a student account. The learning is done through PDFs and videos, there are quizzes to check your knowledge and you write essays as assignments. In special cases you can test out of sections or transfer in credit from other schools.
The one thing to watch out for is the material in the English version of the courses has been translated from Spanish, and sometimes the translation results in confusion. It's good to use online tools to reword the information, or if you know Spanish or are willing to trust online translation, just take the Spanish version of the course. The confusion is not enough to make you fail the course, especially if you are supplementing with outside information.
Overall, I am VERY satisfied with the price and the knowledge I obtained. If you're on the fence, I'd say just do it.
