Back when I started out with WaniKani, I tried to use the provided mnemonics, but quickly found I struggled because they’re pure nonsense. I image that’s the part that makes them work for many people, but if a mnemonic tells me something about, say, Gandhi, and (I know) it’s not true, my memory outright rejects it. It ended up being detrimental to my progress.
If I were starting WaniKani from scratch with what I know now, I would have created fictional characters to fill in the pronunciation mnemonics. For example, I can remember Mrs. Chou quite clearly, although she’s not the same Mrs. Chou everyone else knows; I’ve created my own mnemonics each step of the way for her to create mnemonics I can remember when I need to.
In other words, what I’m really saying is not that mnemonics don’t work for me personally, but rather than WaniKani’s mnemonics (mostly) don’t work for me personally. And as I get into later levels, if I find that I’m struggling to remember new material, I will probably start created my own characters for pronunciation mnemonics.
As for radical mnemonics, so far I’ve coasted along by thanks to kanji I already know. When I already know a kanji, then it’s easier for me to recognize a radical for it, and other kanji that use that radical. This may hurt me in later levels, but so far it’s working out.
It’s a valid question to ask. I’m sure I could just as easily find a WaniKani deck for Anki, or another SRS system, and skip the mnemonics completely. But at that point, I’d be simply be using the WaniKani material sans mnemonics, and I can do that at WaniKani as well =D I like the WaniKani interface, I like the userscripts available for it, and the Flaming Durtles app for Android only improves upon it.
Two or three years back, when I first tried WaniKani (and didn’t stick with it past level three or four), I saw the potential in the system, and the amount of content that had been created for it. Even though I didn’t expect to be using the service myself, I paid for a lifetime membership to help support the site’s growth. That means my continued use of WaniKani going forward is effectively free (in that I’m not making monthly payments).
In the end, everything outside of (most of) WaniKani’s own mnemonics are working out for me, so I’m definitely benefiting from it. I’ve made more progress with kanji in the past nine months than I did the 22 and a half years before then. Progress =D