I'm wanting to do proper funnel analysis with Google, i.e. what % of users have achieved certain goals.
Google seems to present two options for goal tracking - Funnel Visualization, and Goal Flow. Unfortunately the former shows % of sessions, and the latter shows % or # of unique sessions. This data doesn't answer the question of what % of users have achieved a certain goal, as multiple sessions from a single user will skew the results. Is there a way to get % of unique users instead?
You can set up User Segments for each of the different cohorts. Create a custom segment, and add a Condition for Event Label exactly matches the event you want to see achieved. If your events are sequential and mandate the prior event to occur, you can create a series of segments to build your funnel. An example:
Once this is completed, return to Audience > Overview, and show the number of users. Voila.
If you want a traditional cohort graph (where the sum of the cohorts is 100% and you're just looking at relative sizes), you'll need to export the data into something other than Google Analytics.
Limitations
The main limitation of this is that it's for all users. If you're asking the arguably more valuable question of cohort performance for new users (i.e. removing the skew of existing users/"survivors" making your site/app look better than it is), then you need to set up a segment for each cohort for each date range. Quite a pain, even if you're just doing monthly!
