If you want a big difference from what you are used to with a ton of detail go with Smartfetch. Best detail IMO and way easier on your back.
I agree with Tony. Smartfetch Very detailed, and simple.
One more on Smartfetch, step by step and easy to follow. Having done it about only about 4 times before, Smartfetch was much easier on me and easier on dog. I also think 10 Minute Retriever has some very good tips about what is important I'll apply along with Smartfetch. Everyone heard this a million times, but say it for my benefit, not a race, its takes as long as it takes, and as the Dahl's say it, important to make progress and maintain attitude.