I think Anacylus XT is perfect for a gaining phase. It does increase my appetite but does NOT increase my desire for garbage food which is key, for me at least. Many other compounds that increase appetite generally increase cravings for crap in my experience. This is not the case with Anacylus XT.
I loved the original Anabeta and have tried a couple of other anacylus products since AB was discontinued and they were ok but AXT works just as well as AB did for me. The full semi-pumped all the time feeling is there, enhanced recovery, increased libido, and as mentioned the increase in "clean" appetite.
I do agree 100% with @Smont that diet is going to be the deciding factor in any phase be it cutting or bulking. I personally am of the opinion that almost any product that is anabolic/anti-catabolic can be used to gain if the training stimulus and surplus nutrition are present.