Avo is the best way to manage your analytics and make sure they are right. I love that there's only a single line of code for all of our analytics tools and that we can robustly test the data we're sending to these tools in our development environments. It's great to know that we're always shipping good analytics code. This means we can make less mistakes, measure faster and improve our product faster.
I know the team personally, they are super smart and hard working and make everything work for you in terms of analytics! Go AVO!
I don't have a ton of experience with Avo yet, but I'm intimately familiar with the problem it is solving, and I've seen enough (through a demo and through my own exploratory use) to know that this is the solution I always wanted but never knew I wanted. Instead I was stuck with spreadsheets describing the analytics setup that were well intentioned but quickly got stale and were lacking the ability to communicate with the rest of the team, let alone verify that everything is OK between the code and the analytics design.
The main thing I worry is that e.g. the android team and iOS team may interpret an even as happening at different times, so it's unclear if the events *mean* the same thing across implementations. If Avo could figure that part out, it'd be a killer weapon :D