This is almost my favorite tool, barring a couple problems. Its very easy to use, and makes very readable, pretty reports/dashboards. Sharing via a URL is nice, but I really like just exporting as a PDF and emailing them. Here is an example report that took <10 minutes to make [1]. The big problems though:

1. Beta version. You can't use this in production, send reports to clients, etc. when this tool is in beta. A client gets this report and expects all future reports to be this pretty, but Google might just kill it off or it could break.

2. Limited to 5 reports. The majority of agencies/brands can't afford the $100k+ a year for premium G suite. 5 reports per account kind of sucks, and I've had to use old google accounts to get past that limit.

3. Design. Most people simple aren't good at design, so you need a designer to create a good number of templates. Users cannot stray away from templates unless they know what they are doing. While its easy to use, its easy to make things look bad too.

4. You can pull from a Google Sheets, but updating that sheets doesn't play nicely with data studio.

Side ux notes.. changing pages resets the date range which is annoying. Choosing custom colors for some charts doesn't always work.

[1] http://i.imgur.com/1SCUNu1.jpg