It's good. But there are some gaps.
I used Canvas for a long time, and I swapped to Foundation because I found it much more visually appealing. The design was great, mobile responsiveness was good, navigation was great also.
You can build your app out very quickly if you stick with the design concept that's already there. The way they've modularised the template makes good sense, the navigation makes sense and the reusable elements are pretty good to use straight out of the box.
I loved that it has an email template editor and a process where a user can invite another to join your app. These are serious timesavers.
I didn't love the documentation or the community. I didn't find any really useable documentation, and the community was... well, not there. Or at least I couldn't find it. The lack of documentation did slow me down, I had to resort to reverse engineering to figure out how to use some parts of it.
There were also some decent bugs, the kind of things that should be gone by now, e.g. responsiveness issues that make elements overlap on mobile etc.
I'm not sure how good the support is (I didn't report any issues back to the developers) but it's a free template and therefore you can't expect silver service.
If you're an experienced Bubbler then you'll figure out how to make use of this template, but I fear the beginner may be a bit out in the cold with this one.