I've probably already posted this same basic observation a few too many times already, but:
Let's assume that the capsules in this mike are good-sounding to begin with--and that's entirely possible IMO; A-T has a world-class technical department. In that case, if you're going to use X/Y cardioids for stereo music recording, then a microphone like this, with small, single-diaphragm capsules, is FAR preferable to the type of stereo microphone that has electrically switchable patterns (or that uses dual-diaphragm capsules even if they're cardioid-only).
The character of the low-frequency pickup is categorically different between the two types of microphone. Especially if you play back the result on good headphones or on full-range loudspeakers (as opposed to the abomination that is a "combined subwoofer"), the difference in the spaciousness of the recording can be quite large.
--best regards