Design is nice but...
What I like so far:
1) Once your brewing, it has the timers with descriptions.
2) To create your own recipes, or to be able to save them in a format that can help you reproduce the same results easily is nice. And lots of features in recipe creation too.
I have my recipe on paper, but my timing on a few things may be off. With the built in timers, I see that helping me.
Things I don't like/need some minor tweaking:
1) My recipes I deal with are in Liters, not gallons, hops are in grams, ect. To give this app that much more user friendly-ness, let us chose what units we want for measurements, and have your app do the conversion behind the scenes and give us the numbers we know. Kinda annoying that I have to pull out my calculator and do conversions for everything.
2) I'm on my iPad, don't like having to keep it in portrait and hit the 2x button every time I forget to enter a value and the reminder pops up shrinking it back to iPhone size.
2 things to be tweaked and it should be among the top brew applications.