Hello
We are 3CX Gold Partners and use 3CX Phone System for our customers since 2007 and we got many installation on Hotels and Companies. 2 Years ago we had also some cloud deployments without any problems
We chose 3CX instead of FreePBX because It is a commercial product and offers support.
Also It offers VoiP phone provision, Mobile application, CRM integration and a powerful CFD (Call Flow Designer).
I totally suggest 3CX