I am not sure what you mean by a testimonial. I own a condo in Poipu Sands (part of Poipu Kai) and it is managed by Suite Paradise. They are a reputable company and manage a large number of condos in the poipu area. The other big management company is Aston which I recommend that you avoid. Or you can go with individual owners or a smaller management company. I would be happy to answer any specific questions about Suite Paradise, Poipu or Kauai. Also you should visit the MSN hawaii visitor information site -
http://groups.msn.com/HawaiiVisitorInformation .
There are a bunch of discussions about Kauai. Please see my experience at the Hanalei Bay Resort (another aston property) for the reasons I do not recommend them.

Also if you want to see a bunch of pictures of Poipu Sands, my condo and Kauai, you can visit my web page at

http://www.geocities.com/poipusands124/CondoPics.html

Alan