I've been using the SportDog 1225 Sport Hunters every day twice a day for over 9 years now on a Lab and Great Dane.
The durability and battery life is exceptional, vibration correction is by far the most used feature, 95+%. They usually just need a short vibrate, if needed two long vibrates, if that doesn't correct the behavior they get a 1/10 of a second nick, very seldom do they ever get continuous stimulation.
The SportDog training video is very good...... if YOU spend the time to understand it and properly train and acclimate the dog(s).
My dog's are only on a leash when they go into the vet. They can't wait to get their collars on because they know it will be a positive experience.