I have successively used tyre plugs both on my car and bike, most recently on my 675 five weeks ago. The puncture was caused by a nail and was easy to repair. The tyre has remained fully inflated ever since.
Whenever my wife and I go touring, I always
keep a Cargol 'Turn 'n Go'
kit on me It is a good insurance, especially if experiencing a puncture in a desolated (and dangerous) spot far from anywhere -- plenty of those kind of 'spots' here in South Africa
It is more of a temporary repair, but it will get you home or to the nearest tyre repair shop without any problem...