It was very cool, but hard to compare to "Reign Storm". I think both are good on equal levels. "The Ultimate Enemy" has a cooler concept, but "Reign Storm" had a lot more action in it. Here are the main thoughts I had while watching:
-Clockwork was definitely a very cool character. I hope we see more of him. As the Observers said, "You're responsible for him now."
-I liked how some of the villains combined - Box Ghost and Lunch Lady, Skulkor and Technus, and finally, how Vlad's evil side combined with Danny.
-We didn't exactly see enough of Valerie, I thought. She's an interesting character in the show, but to have her appear early on and not be in the rest of the episode/movie was kind of a let-down.
-The humor level in the show has definitely risen above the earlier episodes. "Cool. An older woman likes me." Funny stuff.
-In addition to Valerie, I sorta wanted to see Dash. Meh.
-It's really fun to see Jazz kicking butt.