On site Instructor Led Training is the most effective, and it's probably the best way to learn. Its drawback is travel time, food, and lodging expenses. The other way I deliver training is Virtual Instructor Led Training. This elimates time and travel expenses. While the method is not quite as effective as On Site, if it's done by a skilled coach and trainer, it can come dangerously close to the On Site Method. However in the end, the choice is up to you.