Clicker training provides the most effective overall training method for a wide variety of trainers and subjects.   It is not foolproof and must be given a fair and adequate chance to succeed. I have read a number of books, attended a number of seminars, practiced with many subjects and have had a 'gladdening of the heart' with the training successes using this method.  Now that may sound a bit medieval in its construct, but when all is done, the overall effect of training, is a warm glow of achievement which can readily be recorded in minor achievements (if not major achievements).

Now a word of warning, Clicker training works on a series of small achievements working toward a desired behaviour.

Do not under any circumstances attempt to achieve to final result too early. 

Gradually shape the behaviour, raising the criteria when competency is gained and gradually progress to the next achievable level.   Once the dog is 'Clicker aware', you will be surprised just how fast he/she will learn new tasks.

Those of you who want the 'quick fix',  send your dog to a professional who will have the patience to train correctly.

I still get a real delight, when my dogs, (all 7) come to me and ask to be trained.  They offer all of their behaviours and continue to do this until they work out how to get that clicker working for them.

After some 20 years of obedience/agility/flyball training, I have never experienced such enthusiasm from a dog to want to work as I have done with 'Clicker Work'.  The closest that I have come to this is when I was working 'Sheep Dog' type work where that dogs simply wanted to work as a part of their nature and were highly motivated by this work.