The best thing about gtm server was its simplicity to use in combination of cloud functions. I used it mainly to automate tasks like sending notifications or making webhooks by utilizing google calendar events. I disliked some features they had to add support for third party services such as Stripe. But overall it was good experience having worked with them till date. It has helped us improve our workflow drastically. No other solution could match their capabilities. Even though the UI looks very basic there were no major issues using this platform. So far everything working fine without any glitches whatsoever. This product helps you keep track of all your projects and tasks related to one project and allows easy automation of repetitive task.