I like that it is easy to use, free with great support from their team of DevOps Engineers who are always available for help when needed! It's completely secure so no worries there either as well but if you have concerns about security then maybe look elsewhere? The pricing plan can be pricey depending upon how many containers your app needs or what type they need (memory/cpu).
If this works out within budget we will continue using them because everything has been positive thus far - very simple set up process after initial onboarding which was fast & efficient compared other services mentioned in our research prior trying different providers such an Amazon ECS etc..