It's a fundamentally difficult question to answer because everyone's needs are different. Perhaps my use case is a little unique: I bought one for my Newt because I found that when I was using the manual angle adjuster built into my focuser, the process of loosening the grub screws, rotating, and then tightening those screws would introduce unpredictable tilt into the focuser drawtube. For that case, it made more sense to use the CAA because I could just perfect the tilt with the CAA installed and then not have to worry about the rotation adjustments altering that.
I do not think the CAA setup/implementation with the ASIAir is mature enough, though. Not having any ability to set a zero point in the app is...baffling. And if you set the CAA to "360" degree rotation in the app the behavior of the CAA and how it chooses to rotate and in what direction is seemingly entirely random. The first time I had used the CAA I left that 360 option enabled and just kind of kept an eye on it for a while while testing different targets, meridian flips, etc. Thought it was working just fine. Let a plan run overnight with two targets, one of which did a meridian flip. Came out in the morning to cables wrapped around the body and the a warning. I don't know who wrote the code for the ASIAir implementation, but it's entirely unreliable with that 360 option enabled.
My solution is maybe not so elegant, but it seems to work and resulted in any problems. What I did is enabled the 180 degree rotation option, set the CAA to it's "0"/"180" point, then physically rotated the CAA around until I had the camera sensor aligned how I wanted it so it would rotate 180 degrees (with the EFW bolted to the camera, the EFW then always rotates in an arc towards the mount from left side of the mount to right side).
ZWO claims there is some angle limit built in, physical or software wise, but I have not found that to be the case. And for bizarre unpredictable reasons the ASIAir CAA page will randomly change where that "limit" is. If you imagine a circle being 360 degrees, in the CAA page of the app it may randomly have the limit set at, say, 47 degrees. Thus it should never cross that 47 degree mark moving either clockwise or counter clockwise. But I found that with mine it would always rotate one direction when set to 360, over that "limit". I also found that for reasons unknown to me, on multiple occasions it changed that limit for "47" to, say, "106" degrees, despite me doing literally nothing.
I don't know, it's strange and ZWO doesn't even seem to understand what's happening based on my reading of various threads on various forums. I just know that for now, having set the "180" rotation toggle in the app, moving the CAA to it's limit point in the app, then physically rotating the CAA to the angle I want the sensor to be at relative to my scope, it hasn't deviated from the same 180 degree swing since and I haven't had any cable issues.
