Only good for testing
If you want to test the product the free trial is nice, but nothing more.
The t2.small VM just collapses by lack of memory resources after 3-4 weeks of light usage logging a single Fortigate serving 20 users and 12GB of logs.
This happened twice and had to rebuild the VM from scratch, a few months back with 6.0.2 and now with 6.0.4 upgraded to 6.2.0. One minute after rebooting it is so memory starved that only 22MB of RAM are free!
This could have been great as a gateway product before playing with "the big boys" 200F and up, but ended as an absolute waste of time.
Why did you not try a larger VM ?