Hi Sebastian,
We really like this design. Our business is selling continuing education courses to lawyers, who have to complete a certain number of courses per year. So, the use of the check-mark and the pillar is perfect! We like the navy or royal blue body better than the orange body. I think we probably like the orange check mark better than the green check mark, but we would like to see any other colors that you think would look good with the blue. We really like the way the check-mark is more pronounced in entry 67 (it's not as clear in the other entries whether or not the design is a check-mark). We are not sure whether we like the pillar the same height as the letters or higher? We think that we like the "J" better lower, but we aren't sure. We really love the design overall, and are almost certain that we will select yours (we will also be needing some other logos for other businesses soon), but we would love to see a few other variations of the logo. We are excited to be able to get and use our logo quickly, so we are also willing to end the contest early if we are certain about one of the revised designs with the different colors etc. Thanks! PS -- its exciting to be working with somebody in Poland. I'm Polish (grandparents speak Polish), but I have never been to Poland.