Sorry dat ik in het Engels schrijf, maar mijn Nederlands is echt slecht.
I have an extensive experience with Society Service, having used them for several years. When I started, I really liked them, but over years I become critical or maybe more demanding
First of all, on a plus side you will get a really nice GFE. The girls are nice, open and friendly. Intelligent, good educated and can hold a meaningful conversation. Marike (the owner) spends a considerable effort training them on how to behave and what to do. So, you are guaranteed a certain level of quality. I never had a bad booking with SS lady. Even if we didn't had a good chemistry (that can happen with anyone, it's not something you can control), it was still ok. Not great, but no disappointing either. Also, the punctuality and communications with the agency are very professional.
They also have the biggest roster among "upscale" agencies, don't charge travel fees up to 150km and no extra fee for anal or BDSM (but there is a catch, more on this later). While most girls are in Amsterdam, there are also some in Rotterdam/Hague and few in Utrecht and Eindhoven areas. For those with strong preferences for social part and GFE, they have discount rates for dinner dates and overnight.
Now to downsides. Despite large roster, there is surprising lack of "head turners" or model like beauties . Of roughly 40 girls, I would only consider 6-8 as having a really attractive face. This is result of Marike's choice - most of the girls have quite similar looks. To be honest I think she just prefers those that has the same type as herself. Another downside is that if you are more PSE guy, there only a few girls that provide that. Forget if it says "depends on the mood" for anal, in practice this means "never". And finally, a new problem appeared this year - availability of interesting girls have become horrible. Some of them are not available for months in advance, some only has 2-3 days per month as available.
Last year I've found another, smaller agency I really like now for their "human touch". It is not mentioned above, so I will avoid mentioning the name - this is my first post here after all, and that might look like a hidden advertisement.
P.S. Almost forgot. They are super strict on covered BJ, which is a big downside for many guys.