I'm curious if this has any negative impact on the accuracy of long term memory recall. For example, I can imagine that I would place these exaggerated items in a friends house...then, years later, in a discussion with said friend; "Hey, do you still have that SD card bed?"
You need to also learn a way to empty out your mental palace, or learn a way to build new rooms. After learning about this technique over 15 years ago I stored 3 things that I, to this day, know by heart. After learning Derren Brown's technique I still have these items in my mind, probably to the day I die.
I like how this skill is innate. You don't get born with great memory, you can learn it (not photographic memory). When mastering the memory palace technique, one could store and recall the order of 20 shuffled card decks.