I have read that book, along with How to Develop a Perfect Memory by Dominic O Brien.
I have used those mnemonic techniques in combination with Anki.
It is a mixed bag, but overall pretty helpful, depending on your goals.
If you want to memorize specific details of disease pathways that are pretty arbitrary, like which chromosome a gene defect is located on, the badly named medication that treats it, or the weird gene name of a disease, mnemonic techniques can be a BIG help. You can use the Major Mnemonic system to convert numbers into vivid images, medication names into vivid images, etc.
And there have been times when I've been extremely pressed for time when I've used memory palaces/journeys to memorize the essentials for a medical school exam. They're very powerful techniques-- I can still walk through journeys I've made of genetic disease, some microorganisms, etc.
And if you combine journeys with Anki, you can retain those structures indefinitely-- just have a card that says "genetics memory palace starting with Trisomy 13 in [location]" with a back side that has the whole typed out journey.
Downsides:
generating journeys takes a decent amount of time and concentration. I can be half brain dead from fatigue and still get a tiny bit of conventional studying done-- but it is very hard to generate memory palaces while tired. Generating memory journeys also takes a decent amount of creativity-- something I'm not always in the mood for.
Walking through a memory palace to review it takes a bit of time-- maybe 3-5 minutes for a 40 item journey. So if its in your Anki deck mixed in with other cards, it gets annoying to break your reviewing flow for a long memory journey.
I usually get 85-90% of a memory journey right when reviewing them long after the fact (if I've kept them in anki rotation), but getting it perfectly right is rare-- for this reason, choosing to see it again or pressing hard or easy becomes confusing. Maybe try making seperate cards for small details you consistently miss. But making 40 cards for a 40-item journey is just stupid-- the whole advantage of a memory palace is the compression it allows by linking items in a list to each other, and thereby allowing you to avoid individual memorizing of each item separately.
Tips
If you have trouble visualizing color in your palaces, then for stuff like gram-stain of an organism use vivid images that carry color with them-- examples: statue of liberty for green, ocean for blue, fire for red/orange, grass for green, etc. Or Pokemon for different colors. Sketchy Medical has a bunch of scenes where they have a predominant color and I always found that my mental memory of a Sketchy scene, when I used it, consistently missed the color, unless I modified the scene by adding in something like that I described above.
Use recurring motiffs to symbolize connections between scenes and reduce burden of generating new images for repeated ideas. Tetracycline can be a bicycle in every journey, hepatitis can be a bottle of alcohol, etc.