Note- I try to not use brand names unless I believe a certain brand is integral to the flavor that I am looking to achieve. I am in no way affiliated with O Olive Oil brand, but I love their products and use them often. They age their vinegars in casks, which give them a nice rounded flavor as opposed to the sharpness of most vinegars.
This is one of my favorite dressings, and I use it often on salads, vegetables and even watermelon. It is also wonderful as a marinade for chicken or shrimp. As it is citrus based, only marinade fish or shrimp for 10-15 minutes, or the acids will begin to turn your seafood into ceviche. Use it as a light glaze when grilling chicken or seafood as well. Simply brush it on in the last few minutes of cooking for a wonderfully fresh flavor.
Another great use is as a dipping sauce. When you are looking for something lighter and fresh, this is a wonderful substitute for ranch dressing, or some mayo based sauce.