We had a two day club trip to Little Tokyo, and we stayed overnight here. We were a very large group of 22, but we had everything we needed. Everyone slept comfortably, and space-wise, we all fit well.
We spent about 8 hours here (not including sleep-time) and most of them were evening hours, and it was great. We took advantage of the kitchen to cook, and all items we needed were there (minus the food/ingredients, we bought most of those ourselves). We did bring our own disposable plates/cups/utensils because we inquired beforehand and knew there was not enough in the house for our group size.
As for our sleeping arrangements, we had no problem fitting everyone. We did have some extra air-beds we brought but most of them didn't get used, as our people shared the spaces.
We came in two 12-person vans, and we managed to park both (differently sized) vans in the parking space available, and close the gate. (We couldn't park out in front because there was a car there, but we didn't need to in the end).
Our check in was just unlocking the door (we let Rick know we were there), and our check out was when the cleaner came. It was hassle-free, which we appreciated as we were on a strict schedule.
The surrounding neighborhood wasn't what we were expecting (there were a few houses and mostly small stores around), but we had no issue with it.
Overall we loved our stay at the house, and hope to do another similar one in the future.