Here you have the reviews of people like you who are consuming the products of Global Investigative Services, Inc. (Private Detective) near Maryland.
At present the business gets a rating of 4.7 over 5 and this score was based on 9 reviews.
You must have seen that the average score it has is practically the best, and it's founded on quite a few opinions, so the score is reasonably credible, although it doesn't have a very high number of scores to give it full reliability.
You know that we don't usually bother to give reviews when these are positive and we usually do it only if we've had a problem or issue...
This Private Detective is classified in the category of Private investigator.