So I gave it a try, and left it running for nearly half an hour - Each time the 'generating' countdown reaches 5 or 4, it goes back up to 14 seconds remaining...
By now, I could have downloaded a dating app, created a profile, swiped right a few times, got a match, gone out, had sex, and come back home... & it would STILL be generating my image - How long is it supposed to take? Over an hour per pic???
So, no, not really - Far from ideal...