I've used Micro-tik a few times and once configured they have been fine but their user interface is less that fun to use. I think I only have one device in use still.  I have Ubiquiti and Unifi devices running in approximately a dozen different networks.  I've only had one instance where a firmware update caused an issue and would strongly recommend you reconsider then.  The Unifi Dream Machine Pro coupled with a few access points has been rock solid for me.  It's not the cheapest setup but the ability to easily setup and use remote management is a game changer.  While it is designed to be commercial grade its really easy to use.