I really enjoyed it, and i didn't find it as brain twisting as a lot of the reviewers thought. But I did get a little confused at first over the time line. I think M is definitely dead too and I think according to Sherlocks subconscious (or mind palace) he must always have been the figurehead for a criminal organisation and not a lone master mind.
oh..yes i too really loved the way they executed the plot simultaneously!!
It started off on a good not and it was absolute delight to watch little interactions b/w SH and W,/M,/M😆Definetly M is dead,and must say SH's Mind palace blows my mind!!👏overall a very good episode,liked the powerful abominable bride plot...TFS😃