I’ve been trying out v1.0.1 and I’m afraid Mask AI doesn’t work well enough for me either (as several people have posted) and I hope that it will improve. It would be also helpful if on the 4 up display you could still toggle trimap on/off. And what is very very important to me is (using as photoshop plugin) that the image and mask was returned, not just the image with the unselected parts deleted. Being able to work on the photoshop mask makes a huge (HUGE) difference to me for my masking work.
I learned on the Topaz Joel Wolfson webinar yesterday how to return the photoshop mask. Just create a mask before clicking on the Mask AI filter.