I have both the 3" and 10" models.
They aren't quite as good as the BG Neo3/Neo10s but still measure quite well. I've done a few tests measuring both models in this thread here, as have others, who shared their own experience.
https://www.audiocircle.com/index.php?topic=172523.0The 10" can reliably hit 300hz fairly well in an OB setup, but should be able to dig a little lower in a sealed configuration, which i still want to test. But a woofer is still reqired for anything below 200Z
The 3 inch in a wave guide is reliable to 900-1000 Hz, tho has a slight dip in the 2K-4K Hz range, & a fairly rolled off top end.
