I've had SAEs once. Three of them in a 55 and they did really well for several years, and then all died off over the course of about 6 months. Never did determine why. Nothing had changed.
I actually love CAEs. If SAE's are sausages, the CAEs are logs, lol. I have never bought one, but I always seem to have a couple or so on hand because some newbie bought one and then realized it wasn't all that they were told it would be. They actually hold up to cichlids pretty darn well. They're fast enough they usually avoid taking a hit and tough enough that when they do they aren't instantly killed. Mine always seem to hit 9" or so, and I've always thought of them as swimming cigars. They're not bad for a large tank with large cichlids. They do need a 4' tank minimum, though, and a 6' is better because they really are quite active.
The sad thing about CAEs is that they are misunderstood and sold for a purpose they aren't meant for, so they've gotten a bad rap in the hobby. If people would do their homework and more people provided the right conditions for them, I think they'd have a better rep. When kept for the sake of just keeping them, they actually are a fun and interesting species.
WYite