Sometimes I kinda wish I had known they were gonna start putting out these softcovers when I started collecting MMW, which was not very long ago.  I actually prefer them (heresy?) to the hardcovers based on the paper and the reading experience.  The only thing I think is substantially better about the HCs is having original cover artwork on the collection covers.

That said, I'm mostly interested in the Atlas stuff, which I simply couldn't have waited for PB versions of.  The other MMWs I collect are the Kirby and Ditko Silver Age books.  At this point I've bought FF Vol 1 four times in order to get the "best" version. (No doubt my lack of knowledge about the different versions led to that, but it still chafes!)

I should also add I really do like having the letters columns in the Omnibi, so there's that...

"I'm OMAC!  Evacuate this section!  I'm going to destroy it!"