I have had a 909 (green / red LED) with an Elite Pre connected via Quad link getting on for a decade now.
Observations
It draws 40ish watts when idling
It gets hot, like hand-burning hot, but only if driven hard. Most of the time it's just hotter than any other amp I've ever owned.
It can drive my speakers (Monitor Audio Silver RX6) effortlessly to their compression limit
Can be a little bit noisy - there's always a grainy background noise, obviously you need to put your ear to the speaker to hear it, but it's there. I've always suspected dirty mains and nearby computer equipment contributes to that. I read many years ago that it is better to connect your power amp directly to the mains rather than use a filter due to potentially hampering dynamics. All my other gear including the Elite Pre is on a filtered gang, but not an esoteric / audiophile one
It does pop when you apply mains power, but I've never considered it to be excessive or potentially speaker damaging
I love it, it does the job, and is the least likely component in my current system to be replaced. I think my speakers are the weakest link right now.