I swatched three Layla Mirror Effect polishes about a week and a half ago and said I would do a stamping test with them. I stamped them over Essie - Dive Bar. I also had one of the Layla holos out so I thought I'd test that too. I used an image from Bundle Monster stamping plate BM-304 for the test. I think they stamped quite well except for Flash Black.
Index: Layla - Purple Diva
Middle: Layla - Titanium Sky
Ring: Layla - Metal Chrome
Pinky: Layla - Flash Black (holo)