We didn't book Poipu Shores 101B originally. We booked a different condo managed by GVR, but as soon as we landed in Kauai, we got a call stating that the condo was no longer available. Poipu Shores 101B was offered as an alternative. Poipu Shores had lots of issues for us, especially since we were traveling with a toddler. We ended up leaving after one night and found a better place down the road for the rest of our vacation.
Poipu Shores 101B is probably ok if you're just looking for a comfortable bed, not traveling with a child, and can put up with a fairly run down condo with no cell service. The pool was very dirty also.
Our main issue with GVR is that they listed (and confirmed) a unit that wasn't even available to rent. That was very frustrating to deal with during our vacation, especially since we were traveling with a toddler.