Here is a challenge. Learn Russian. The you can fly the Tupolevs and Ilyushins by the numbers. That should keep anyones interest for a substantial amount of time.
MS peaked with FS2004. The balance between freeware and payware was wonderful. Yes FSX was fancier graphics but with careful addons FS2004 gives it a good run for its money looks wise.
It depends really on your priorities. Simulation or prettiness. If simulation is your thing then Level D, prettiness then Level D. It is a shame that there are no more modern contenders. I look at how many 737's there are out there.
Avast reports the install.exe as a virus. It is not however I found once installed and ancillary 3rd party items installed the prog would get in a loop and not start.