The house was great! We'd totally stay there again. Here's what we found:
Kitchen: We didn't try to cook, but there was plenty of counter space. Plan to run the dish washer after every meal since there's only that many utensils. We were only given one dishwasher tab that I could find.
Master suite: King bed, full bath. The bath has a weird tub/shower that works fine, but there's no door/curtain. Looks fancy, does the job, wouldn't choose for my house.
BR 2 & 3: Queen beds. Good, no troubles.
BR 4: Four twins in day bed/trundles. Good for kids. Not so good for adults.
Bath 2 & 3: Large showers and good counter space, though one is larger than the other. No complaints.
Washer/dryer worked great.
Two water heaters. Two showers at once were no problem.
Patio: Nice sized, great for outdoor meals and relaxing. The pictures show a grill, but we didn't use it.
Parking: 3 cars fit parallel next to the house, no problem. More could fit on the street.
Neighborhood: Very quiet once the neighbor took their dog in.
Location: 30 minutes to Zion, 30 minutes to St George. Good restaurants close (Pizza Wagon, Main St Cafe, Peruvian Flavors, Red Fort).
These aren't necessarily complaints, just what we found and you may want to know so you can plan. I'd like to be more positive, but VRBO limits characters in reviews. 5/5 stars!