Here is a description in an old article, however it doesn't look very easy. A "step by step" guide would be really necessary, because at least on the Burst side there is no special GUI element that does facilitate the trade via Automated Transactions.

So I am also eager to hear "real" experiences of completed atomic swaps.

I plan to do a test ACCT trade, selling Burst/Qora to myself, in the coming days. I still am syncing the blockchains and preparing the nodes. I'll report my progress here and in the Burst thread.