I have recently completed fellowship and have recently taken the cardiology boards.Over the last year I have used/borrowed the textbooks by Weyman, Feigenbaum, Otto, and have owned the most recent baby Otto.The Echo Manual is the best single source for a new cardiology fellow and for anyone studying for the Echo boards. The clarity, depth, and breadth in such are small package are not matched by any of the other books. It has excellent diagrams and tables. It does a great job of covering complex topics such as diastology, constriction vs restriction, and congenital heart disease.The Weyman is out of print. The big Otto is too big for board review. The baby Otto is too simple to be of help to fellows and techs. The Feigenbaum is a good book and it comes with a DVD of examples. However, the Echo Manual simply covers the topics better. It works great as a board-review book and just as great as a reference. If you only have room for one book in your budget, I would recommend this book.Cons: No DVD. Mayo displays the R and L heart in reverse of everyone else. Text can be dense. Overall, these are minor gripes.