Coming from DSLR the Sony A7xx will feel very different. Generally I'm not a big fan of EVF but as I'm now shooting with this series cameras since they're out, the A7R II since August 2015, I have to admit they have a lot going for them. It's a very flexible system, articulating LCD is just one point here, files are great (uncompressed RAW is an option). Reliability has been great, very rarely do I have to reboot, and I've been in all kinds of weather, Ocean, Iceland, Death Valley, per cars, trains and automobiles and it all just works. My reservations are mainly: lack of dual cards for backup and dedicated focal point selector, small camera interface and general menu layout along with no custom page of frequently used adjustments and general "sensor" cleaning. Sometimes the built quality of the moving parts give me pause, but I have them now for 19month and it's a Sony not a Pro grade DSLR.
In other notes, I love the new G Master zooms and Loxias and I rarely have battery issues, shooting electronic shutter nearly exclusively I get 1200-1400 frames out of a day before I need to switch. And I love the packability along with the option of crop frame shooting and 4K video.