Well, I don't know about Chad, but I started on the very superficial point of good looks. Then, I liked the very large boilers, with 1.4 liters for both steam and coffee -- fast recovery. The steam boiler uses a commercial Sirai pressurestat (good to reduce need to descale), and the coffee boiler is PIDed. The innards are all high quality commercial stuff, well designed. The icing is the three-way switch, with which you can turn on only the electronics and pump, or any or both boilers. I turn the coffee boiler on early to start the grouphead warming, then turn on the steam boiler shortly before using (it reaches 1.5 bar in a few minutes). After I'm, done, I will turn off the steam boiler if I will want espresso later, or turn off the coffee boiler if the wife will want hot water for tea, or I will just turn the whole off until next time.
I have heard from those with more experience in the E61 world than I that the "true" E61 is bigger than the others on the market, and is 2 lbs heavier. I just know that this baby is pretty. Also, check out the exhaust extension on the grouphead to avoid splatter when turning off the pump and evacuating the grouphead.