Also a brewtoad user.
I agree with Jayhem -- sometimes I do miss hopville, but after getting used to it I quite like brewtoad. Best thing of all, though, is that I can get to all of my recipes/brew logs/calculators from anywhere (that is, my phone). I'm a big fan of working out my recipe at home on the website, then all I have to do at LHBS is navigate to the grain bill on my phone.
Only complaint is that I often find the math to be a little funny; when compared to predicted gravities, IBUs, SRMs, etc from other popular software, websites, or even numbers in published recipes, there's always something that's just off. Clearly this isn't a big enough problem to stop me from using the site.
I'm also a big fan of the recent overhaul of the site. I find navigation easier, stuff is less cluttered, and the features I actually use are highlighted rather than buried. I had some frustrations with the recipe process, especially regarding "custom" ingredients not in the database. However they've continued tweaking, and most of these issues have been resolved.
</babbling>