I am a trained barista and am very selective of household espresso level machines. My Eletta Explore with cold brew made me a believer. 
I drink espresso or americano in the mornings and the crema is professional quality. My wife loves an oat milk mocha. 
Turn those to afternoon drink and the cold brew options are unbelievable. When friends are over I feel like I can offer them anything they could imagine. It’s easy to choose the type of drink from the digital panel. There are many options.  The cold brew feature and ability to foam is outstanding. Better than I could’ve ever imagined. 
As for the Eletta App, I am still getting used to it.  Love the idea and my wife seems to have more success with it.  For me the app isn’t necessary as it’s so easy to use when I am standing in front of the unit.