As a big fan of using IB for layouts, the integrated designer and Reveal integration looks promising. I had bought AppCode 2x, but I ended up just sticking with Xcode instead of flipping back and forth between apps. Now that it's all in one place, I'm definitely more likely to give it a shot and stick with it.

In terms of Reveal integration, I see it says, "The integration is provided via a plugin and is open source under Apache 2.0 license." One thing I'm not clear on: do you still need to purchase Reveal? It does say you need to install Reveal 1.0.4+ to try it, so I'd assume so.