Wonderful sunset (sunrise?) colors. The yellows, reds and blues create a pleasurable impact. I wouldn't have put the horizon exactly in the middle though and gone with either showing more sky or more water but not half of both.
Just a pretty sunset. Great color reflections, nice use of the lighting. I would half and half the positive and negative space...or used a bit more of the negative space if there were some more clouds above.
I think that as your title says, this is “just a sunset.” It is tough to do well with these types of pictures in challenges because I think every one of us has taken sunset pictures and I am sure we have all seen some quite spectacular ones presented. Though I think you have captured a good one, as a reviewer I have seen my share of great ones so I have a lot to compare it to. The exposure in this picture looks good but I think the composition could be improved. I would either cut out half of the water or half of the sky to make either one or the other dominate. I think you have chosen a lovely location and overall have done a good job here. I gave this one a 5.