I personally feel like training should held at the establishment you work for by in house trainers. Sometimes when outside parties come in to train they are goin off of a check list which 85% of the information has nothing to do with the job we were hired to do. Its easier to learn from a individual who has been in the same position you are currently in at the same company. They can teach you the basics of what you have to know, but they also can give you tips and help on certain siuations that go on at the job site the a outsider would not know about. It makes it more interesting and easier to learn.