Clicker training is excellent for teaching new behaviours. IMHO It has nothing to offer for behaviours already known (except possibly to sharpen them up or indicate what level of performance will be rewarded), or for disobedience. It is simply a very effective way of marking the behaviour you are willing to reward, and once the behaviour is on cue, you put the clicker away until you wish to teach a different behaviour.
Clicker training has its limitations for training at a distance or for training certain things to certain species, e.g. most horse training for mounted work involves negative reinforcement. What is required is far easier to convey by the use of pressure and release of pressure (rein signals, leg pressure), which will reduce to a subtle cue in a well trained animal. I have clicker trained horses to do liberty behaviours, but would find it awkward for under saddle work, although I do use marker words which indicate that a reward will be forthcoming for the performance. Those using clickers with horses also seem to be relying on more conventional means as well.
Most dog "clicker trainers" don't advocate throwing the leash away, either, which if you are doing pure clicker training would pretty much be a requirement. Gentle leaders, et al, are negative reinforcement tools, as is a leash. If you were a purist, it would be difficult to imagine how you would exercise your dog in a city with leash laws, although it should be possible to train him never to put any pressure on the leash at all. Anyone here done that with their Basenji?