Essential Dr Strange collects Strange Tales #110, 114 and 116 thru to about 160 something. That's not really true though, as you don't get all of the issues listed. This is because Strange Tales was mostly a comic for The Human Torch, so they don't give you the half of the mag with him in, just the covers and the Dr Strange stories.
I had a little trepidation about buying this book, as it is in black and white and not the original colour. Though, while I still believe it is just Marvel being cheapskates, it does work on the most part for Dr Strange. The single colour gives it an air of mystery and intrigue that works well with the stories, though I can see it not working for other essential titles, like Thor and the Silver Surfer.
The writing is pure 60's cheese. No sentence ends with a full stop, always an ! a ? or a !!. This can get a bit annoying, though you do tend to get used to it as you move along the tales.
The dialouge also feels the 60's cheese, but it's less self-congratulatory than in books like the Avengers and the Amazing Spider-Man.
The nice thing about the book is that it's got all of the stories that appearing in Strange Tales, and doesn't just collect the arcs. This can occur in some of the more recent trades, and you can end up with stand-alone issues missing from your collection.
You get to see Dr Strange grow as a character throughout the book. His original cape and amulet are replaced with his trademark ones as you go along and you see his standard villains, (Nightmare, Baron Mordo and Dormammu) evolve also in the stories. Nightmare starts out as a black shadow but becomes a more monsterous character.
Overall, if you can stand the lack of colour, Dikto's often weird attempts at drawing people and Stan Lee's writing, you're in for a treat if you buy this book. May the Hoary Hands of Hogarth protect you.