You’re asking a whole bunch of people that pay for the service if it’s worth the money.
Thanks to WK, I’ve been able to read a lot of signs outside and I’ve started reading light novels.
There are other free ways of learning Kanji but WK makes it such that it’s fun and I want to learn more.
I bought a yearly subscription which saves 2 months worth of subscription but I do not plan on staying for more than 3 years. I think I would have moved on and started learning on my own based on the foundation WK has given me.
If you like it past level 4, I suggest buying a lifetime subscription around the end of the year when there is a sale.
Not sure the price but definitely worth the price.
No, you can’t skip lessons but it’s not a problem because you know most of the basics, right?
WK has it’s own name for radicals and the reason for doing beginner levels is to get used to them. You can add your own synonyms if you like. I assume people who’s mother tongue isn’t English use their own synonyms. It only takes 4 consecutive correct answers to move on. You’ll fly by in no time as long as you log in once they appear in your review queue. I think the fastest level up is in 3 days and 20 hours.
Once you start your subscription, the rest of the vocab, kanji and radials are unlocked. You can start studying the items you don’t know while quickly leveling up. It takes 90% of kanji to level up which is ok for you since you know “most of the basics”. You can have some error for the kanji you don’t quite know yet.