This is by far the theme I worked at the most, it's got over 50 hours on it! Making 12 different colors in 2 variations is no easy task! That's 24 themes. It takes my computer about 15 minutes to compile each theme! Yes, it is slow but it's mainly due to the fact that the theme is HUGE. There are a ton of 3rd party icons! But make no mistake, it's lightning fast! The main reason is, well, the colors are pretty simple and there are only very few transparencies and gradients. So expect to see your phone perform the same, if not even faster, than the default themes (mine's faster than all the defaults).
It's hard for me to go back to any other theme that doesn't skin the toolbar buttons. It's impossible actually. My most recent struggle: Which of my themes do I want to use? And which color? I keep changing colors all the time. I can base it on my mood. It's awesome.
Update: I went to see how many icons I actually added. 3rd party icons: 250+