I've uploaded two pictures to the customer images gallery comparing the KwikGoal shirt advertised on this page and the Official Sports economy long sleeve recommended by USSF (It's exactly the same as the Pro shirt; I just happened to have the economy shirt out as I was finishing up my laundry!).In the close up, you can see a very slight difference between the shirt colors. In the far shot (taken about two yards away), it is much harder to see a difference. By comparison, the old style OSI shirts (with the thinner pinstripes) and the current style have a MUCH greater difference in color, which can be seen from any distance.I've walked side-by-side with referees wearing OSI shirts, and could barely notice a difference in color. No official has ever commented on the difference, or even commented on the fact that I wasn't wearing an OSI shirt.Positives:---Handles sweat and rain far better than OSI's shirts do. This goes for the OSI economy shirts (of which I have 14), as well as the OSI Pro shirts (of which I have 4). OSI's shirts suck up sweat and rain and never let it go, making you feel like you're carrying a bucket of water on your shoulders. The KwikGoal shirts handle sweat more like a mediocre soccer shirt. Not great, but much better than OSI shirts.---Buttoned collar looks nicer than the open collar on the OSI economy shirt, for a lower price.---99.9% of people you meet will never notice that you're not in the "recommended" USSF shirt.Negatives:---The badge holder is off center! See my third image. I know they meant well, and *technically* it is centered if you ignore the pencil well and pocket flap, but it is NOT centered over the entire pocket, so it just looks odd to me.---The pocket flap is attached across the entire pocket, so a long enough pencil will prevent the flap from closing completely, making the shirt look a bit sloppy. By contrast, Score shirts don't attach the pocket flap where the pencil would go, so they close more neatly.---0.1% of people you meet will probably notice that you don't have an OSI logo on your pocket, and you don't have a USSF logo on your sleeve. Some of those people might even notice that the yellow is slightly different.Conclusion: If you plan on upgrading beyond grade 7, then you may want to buy all 10 OSI Pro shirts so that a picky assessor won't bring it up. For the other 99% of USSF referees, however, this is a great way to save money while getting a shirt that, admittedly, fits better, and handles sweat and rain MUCH better than OSI's product.