Our extended family, including 8 adults and 7 children under the age of 6 had a great time at the Westin Kierland. The service and kid activities were great, as were the pools, lazy river, and slide. There is a separate pool for adults that seemed nice.....from a distance.
A few drawbacks (tiny hot tub, full size beds instead of queens, and occasional surliness of waitresses at back outside bistro) were easily overshadowed by nightly bagpipes, a splendid scotch selection complete with kilted expert, and impressive grounds.
Definitely recommend for a family getaway.