I went on vacation with my Nikon 55-200mm f/4-5.6G lens. I did a lot of bird watching and whale watching. I had a lot more fun taking these types of pictures than I thought I would. I think I took some great photos, however some didn't turn out exactly as I thought they would. The biggest issue is the sharpness when zoomed in. I took a picture of a white flower on a lily pad. I was zoomed in to the max. The edges of the flower where it overlaps other parts of the same flower aren't very visible. The other main issue was the actual amount of zoom, in some cases, such a birds, I couldn't get any closer to the subject and the lens just didn't get close enough to fill the frame in the way I wanted it to.
I do think this lens is pretty amazing for the price, but I would like to find something with better zoom and more importantly sharper.