My team tried it several times over the first 1 - 2 years it was out. I have not tried it recently. That said, at that time, we could never get it to stick. It was good for high level stuff, but like all project management software, we ended up constantly working to keep it in sync with reality. This was especially acute when using github because for any stuff that was code-related, we were basically duplicating tickets and tracking in both places. So github tickets were the real source of truth and Trello always lagged. Once that happens, the non-code milestones start to suffer as you start wondering why you're doing all this in the first place.

Tracking issues in github (and we use FogBugz as well) has the benefit of being where the "rubber meets the road", so it's effortless and transparent to keep up to date. Merging non-code tasks (e.g. design work) with code is still something we struggle to track and keep tabs on.

Yes, we (at https://codeable.io) use Trello for pretty much all internal (async) communications, from Sprints (user stories) to features, to ideas,...

No learning curve, exactly the right features.

And also there's something I like in Trello that Basecamp (I know comparing apples to oranges, but both can be used for similar purposes) doesn't support: closure. When something is no longer relevant, you archive it and it's gone, no more mental burden. Quite important when you have 100s of tickets.

My research lab uses Trello to coordinate on protocols, results, and publications. Each project gets a board, with lists for each step in the process. Cards are used to describe what was done in the processes like a typical lab notebook. Add on comments and file attachments and we can collaborate remotely.

Yes, heavily.

I keep it simple: Todo, Doing, Paused, Done.

Colors indicate severity and I attach most task assets (documents, proposals, etc.) to the back of each card.

As tasks get done, they move through the pipeline. Some folks I know have an "inReview" list also before "done".

It's pretty simple that way. My only complaint is that when lists get too long it can be kind of a pain to manage them.

It works really well for smaller projects, but in my experience quickly falls apart when more extensive planning and collaboration is required. YMMV of course.

The itch I needed scratched was that Trello lists sometimes disintegrate into junk-drawers. Their API let me build something to pull out a list, let the team rank the cards and then reimport it into Trello. Yay for killer APIs! http://blog.forcerank.it/tame-your-trello-backlog

I've used it when needed (i.e. someone picks that to get started), but honestly Pivotal Tracker is the same thing with more features and even crusty old JIRA has an agile board view option it nowadays where you can drag card versions of the JIRAs around. So Trello is kind of an also-ran that doesn't compare well with the current leader or the industry standard.

I use it for personal project managing but I knew it was popular when my girlfriend's sister was showing it to her Dad. She does R&D (chemistry) at a water proofing sealant company. The company has 30 employees and they use it to track projects. I need to get out of my software bubble and realize that a lot of tools can be applied to other industries.

Yes. It works well for us because you build your process on it rather than having a process dictated to you. A lot of the "agile" project management tools are too opinionated about how you should work, and hence are difficult to use unless your process fits exactly.

We use it as our (kanban style) task board.

We're a pretty small team, I wouldn't be sure how well Trello scales to larger teams.

It has some nice features though. It's integrated with our slack chat, and it's very easy for users to pick up.

I have used it for pretty much everything since it came out. Both for my own personal use, for my small company - and for several clients/projects.

We use it for backlogs, sprints, operational tasks and many other things.

Me and my business partner use it for everything work related.

It's been excellent.