I'm a huge Rocky fan, but especially the first movie which is one of the best movies ever made IMO. Lots of people forget that it won 3 Academy awards including Best Picture.
Creed is every bit as good as the first Rocky. Great story, great dialogue and Sly probably deserves an Oscar for his performance.
If you liked any of the Rocky movies at all trust me, go see it! Best movie I have seen in years.