Challenges moving to Eisy?

[andrew77]

I’m probably going to take the plunge and get the new ISY, EISY. I see the Canadian dealer (aartech) has them in stock again. 
I read a topic here saying there were growing pains migrating from the 994 to the EISY. 

I’m about to replace my furnace and finally get a smart thermostat. Are there any thermostats the EISY doesn’t natively handle? Any I should stay away from? Any that are particularly good?

I’m a newbie to smart thermostats as I have an old Coleman mercury thermostat 

[Geddy]

@andrew77 take a look at the Coffee Shop area. There have been a few discussions about this question there.