Has anyone tried completing RTK while taking a Japanese class?

Heisig does warns us that combining RTK with the traditional study of kanji has an adverse effect on the learning process. I was hoping that I'd be able to complete RTK1 by the end of December. In class we study around 20 kanji every two weeks.

Before I get myself into RTK, does anyone advise against it?

My opinion is: it's not going to hurt you.

I find that studying them alongside in the traditional manner whilst learning grammar, vocabulary etc completely solidifies it in my head for me.

Personally, I stopped training kanji in a traditional sense when I started doing Heisig. I don't think it's counter-productive, but I do think it's a waste of time. Since you have classes and can't skip the traditional ones, do them together.

The only danger is that you may become so enamored with doing Heisig that you neglect your other classwork - this has happened to me while studying for the JLPT2; I have picked up Kanji at the cost of studying grammar.

But everyone reacts differently. Do it alongside your classes, pay attention to what happens, and adjust accordingly.

I did RtK while taking classes, and I can't say I've had any problems because of it.

That's good to hear. I'll be starting RTK, then.

Being able to associate a RTK kanji with a vocab word you already know really helps you learn both the kanji and the underlying vocab word. Some kanji which were difficult to get to stick, stuck almost instantly when I associated them with a word in my vocab SRS. At that point I didn't even need the story (which stories were never working to get those few kanji to stick anyway).