I have tested many of the DNS services using their free trials. I think they all work for the basics, although since they don't generally test the Chromecast, you may find that some sites don't work on the Chromecast with some DNS services. Unlocator didn't work with Pandora for me at first either, but they eventually fixed it - it just takes a while to get started, and then you may have to disconnect and reconnect to get it in sync with the Android/iOS app. That's true of some of the DNS services as well.
Tunnelto.us is supposedly in the process of implementing Netflix region switching. I don't know if they will support Netherlands or not. Keep in mind that most of these free services under development tend to move to paid subscription once they get Netflix region switching working, because that requires them to make a serious investment in having paid servers in every supported country.
But personally I currently use usaccess.ca, which cost me $18 for a year on a special promotion. Until now I was using Unlocator for Netflix region switching. USaccess.ca is working on adding that, but until they do I guess that on the very rare occasion that I want to watch anything from a non-U.S. region, it will be time for another 1-week free trial with one of the other services.