In my opinion reputable and broker don't go together in the same sentence.
I went to the site, plugged in my breed just to see what would come up, viewed quite a few pups, and saw prices that were all 3 to 4 times what I consider to be the going rate. That right there tells me all I need to know about the low level of integrity or complete lack thereof. I'm sure that additional digging around at the site would only reveal many, many other red flags as well.
Anyone looking to add a new pup to their family would be best served by contacting breed clubs and taking a more conventional and trustworthy route. I mean, good quality dogs at a fair price aren't *that* difficult to find with a nominal amount of effort. People really shouldn't be so lazy that they resort to a commercial brokerage. Doing so is just really, really poor consumerism all around, and does a great disservice to the reputable breeders who are out there.