What do you like best?
One of the absolute best features of this service is the Activity Log: Every workflow you create gets everything logged. Every action, every chunk of data and every type of error. Sometimes you will have to dig deeper to find out where you've gone wrong, but thanks to the logging filterable by exact day and time, you will have, at the least, some place to start or reference. Logs also go back up to 30 days I believe, which is neat.
The second best thing about Flowgear would be the support: If you have any problem or confusion regarding anything, don't hesitate to shoot out an email or talk to them through Intercom (recently implemented). They get back incredibly fast and are really helpful in solving any problems you may have. Feature requests are also taken into consideration and discussion behind the scenes. I recently requested this feature to have the ability to see what workflows, a selected workflow appears in. (you can make workflows that use each other. It's very much like Object Oriented Programming on a bigger scope) It was implemented no more than a month later and makes this tool incredibly powerful.
Last but not the least, you can pretty much build any automation you want. There are nodes for everything: Web requests, PDF conversion, Excel parsing, XML handling, JSON handling, Custom Scripts etc. If you don't find something you want, you can either request it or make it yourself. (Although I haven't gotten into that just yet so I don't know how straightforward it is.)
And that brings me to one of the other most powerful features of this: You can even make your own API because each workflow can act like an HTTP endpoint. You can specify what you want it to be: GET, POST, DELETE, whatever you need and you can send any kind of data. You can also let workflows run forever or on schedule, by month, week or day, down to the interval and minute. There is nothing else on the market right now that allows for this amount of flexibility.
What do you dislike?
Don't expect to be writing really custom code that utilizes packages from Nuget for example. (Flowgear is C# based I believe) You have the ability to write some amount of custom scripts but they're mostly scoped: they perform one or two operations. For example, custom code to clean whitespace & double quotes in HTML so they can be sent through JSON. You can't write code to interact with more depth just yet. However, this is not something of concern for us at the moment, as we've built a lot of incredibly complex systems without needing to have this functionality.
Most of the nodes are also XML based. (Pretty powerful actually) There is a node to pull data from JSON and converting JSON to XML (and vice-versa), but other than that, you'll have to write custom code to work with JSON. This might change in the future.
Only other gripe would be the administrative features for the company account. I believe they're still in development but adding new users and managing their permissions currently has to be done by talking directly to support. You can easily make sub-sites, with multiple users though, it's just that its not in the web app yet.
Recommendations to others considering the product
This is one of the best automation tools out there with a lot of flexibility. However make sure you go through your requirements first. This is not like Zapier, FlowXO or Automate IO. This is for companies that need more power and customizability.
If you just want more complex integrations between multiple services, go with Flowgear.
What business problems are you solving with the product? What benefits have you realized?
We've solved a lot of problems with this tool, so much so that it has become indispensable.
#1: Automating an incredible number of our processes. Creating Zendesk tickets for example, with data pulled from many different sources based on triggers from other services.
#2: Serving as an API endpoint for our internal apps. (amazing!)
#3: Setting business processes to run on a schedule.
#4: Automating email delivery.
#5: Running business processes to be triggered by webhooks.