It is very easy for my doctor who works at two different facilities to communicate with me as well! I like that you can see your labs in one place - not having them all dispersed throughout multiple apps or websites makes it much easier when trying to look up something quickly because i don't have to sift through several sites/apps looking for what I'm searching for (if this isn't right then please tell).
The ability to send messages back & forth has been extremely helpful too!! Nothing really other than just being able find everything easily under 1 app helps keep things simple :).