Our family of 4 had a terrific stay at Catherine's! The space is exactly as described and in the photos, and it was a good size for our family, with the pull-out sofa bed. We enjoyed being in the Luana hotel, and utilized the nice pool area. Bonus for the extremely well rated Poke and breakfast restaurant, Fish Hook, right by the front lobby!
Of note for ANY location you stay at in Waikiki... parking is going to be an issue if you don't want to pay the $40 valet fee at the hotel. We happened to find street parking on Ala Wai Blvd or a nearby side street fairly easily, so wound up avoiding the valet fee for the week we spent there, but it does take some coordination and patience trying to parallel park on a busy street like Ala Wai. Also, there will be street noise in the room, as the entire area is very busy with car traffic, sirens, garbage trucks, etc. The double paned glass doors help, but will not shut out all the noise for light sleepers, so bring ear plugs if you need them.