My sister has them and she barely notices them. She got regular retainer on the top teeth and bonded in the bottom. Needless to say the top retainers didn’t fit after a few weeks of not wearing them, she tried to squeeze them in and the pain made it unbearable. She’s had no issues with dental cleaning and she barely remembers they are there. I can just notice she brushes a little bit more behind her teeth to avoid plaque build up