The list of all legally recognized study curricula is on
http://www.ib-groep.nl/zakelijk/HO/CROHO/R...oaden_CROHO.asp . I have processed this information and put it on the Dutch Wikipedia articles about these educational institutions. So, don't take it for granted that if NTI says that it is a good quality study, it would be legally recognized. In general, they advertise as having "many recognized curricula", but are not very specific about which curriculum is recognized.
Diplomas from NTI, LOI, NCOI and OU are not highly regarded in the academic life or on the job market, except when your employer pays for your NCOI training. In the first case, it is kind of ersatz-credential, while in the second case is your door for future promotions. While, legally speaking, the answer to this question is either an "yes, you got a degree" or a "no, you did not get one", according to whether you got a legally recognized credential or not.
However, educational institutions may offer not legally recognized degrees as they see fit, but in this case such degree is not something very valuable. E.g., there was a scandal with some foreign students of a HBO, who got the internationally worthless Master of Design in place of the promised Master of Arts, and sued their HBO and received damages from it.
According to some critical TV consumer shows, the exams in the distance learning institutions happen kind of chaotically (anarchically), due to organizational problems.
I think you should take such courses only as a last resort solution, provided that the degree is recognized. The mainstream HBOs and universities already have part-time study curricula, which still offer recognized degrees (yet somewhat seen as less desirable than full-time study.) In general, such programs are there for people who are working and study in their little free time they have from their employers. Some government institutions even insist that their employees take some university courses/degrees, either for being internally promoted or in order to avoid being laid off.
If you only desire to obtain some information, distance learning could be fun, otherwise consider it with great skepticism.