I've done a LOB with emperor divers out of port ghalib. Not specifically Echo, I was on Asmaa, but can speak to the operations since I was doing 4 days local boats before, Asmaa, and then 3 days back on local after. Brit operation, really well run and most importantly, managed locally. Top-notch, they organized all my transfers via zodiac across the marina, and they really handle all the logistics. All I had to do was sit at the lodge drinking a beer until they came out and told me that the zodiac was ready to take me to my next boat; true vacation!
For the liveaboard itself, the crew was awesome, they know how to run a fun yet safe trip. Boat was very nice and the food was awesome.
I second (or fifth) the comment that if you want sharks, BDE is the way to go. But also no night diving is allowed on those sites. Still worth it in my opinion.