I think it's really good! With a suitable place in a page, I think this banner will defintely stand out. I like your use of gradients as well as animation, very nice
As a few mentioned, the animation of the "Instant activation" text does shift but, for some reason I think you did that on purpose. A sort of...fade to the right effect? If that was what you were after, you may want to bring in the "500mb disk space" after the "instant activation" text fully fades away.
But it doesn't mean that if the design didn't please one person that it's not good. We all have different tastes and if you were to take every comment you recieve to heart, then we'll never be able to focus on properly improving your personal style.
Keep up the great work nightspy, I like the banner very much!