Opinions: Another Lab Breeder

My sister and her husband are thinking about getting a dog. The breeder that they are looking at is below:

http://www.irelandfarms.com/home.php

Any thoughts/has anyone heard of them?

They are looking for a dog that will go hiking, running, and hunting with them, but also will be a good "house dog." Namely, they need an athletic dog, but I think that they'd be frustrated with a dog who had a bad off-switch. Otherwise, their requirements are pretty run-of-the-mill... good temperament, health, etc.

Here's a few that I found:

http://www.cedarwoodlabrador.com/services.html

http://www.clovercreeklabradors.com/testimonials.html

http://fclabs.us/mainpage.html