I've been staying in Hilton Grand Vacations (Grand Waikikian or Lagoon Tower) for 5 years now and they have been very consistent in offering good service and classy amenities in the room. The Lagoon tower suites has been renovated and interiors are now modern. Grand Waikikian of course have better designs, but more expensive and farther from the beach front..

1) Beach front, easy access to the beach and swimming areas
2) 10 to 15 minute walk to Ala Moana Mall
3) Few Shops and restaurants are accessible and within the grounds of the hotel
4) Tours can be easily arranged at the concierge
5) Kitchen and utensils are provided
6) 2 Bedroom unit is value for money for 4 to 6 guests.
7) Free wifi internet in the room
8) You can take a relaxing 10 min walk along the waikiki beach if you want to go to other shopping areas along Kalakaua Ave
9) Lots of ABC convenient stores around

Cons - late check in, but you will be given free access to lounge in case you want to freshen up.

We stayed here on the basis that it had the best pool facilities for young children, however, we found the pool so uninviting that we did not use it at all. It was in the shade for most of the day and the water was freezing. The lagoon is great.
The hotel itself is fine although the check-in was less than helpful. We got in at 6:30am and were left waiting until after 3pm to check in. Far from ideal after a sleepless overnight flight with a 1, 3 and 4 year old.

Stayed at the 3rd floor of the Lagoon tower. Two bedroom suite, very nice, big receiving area and a cool pantry and dining table to have a meal. However, since the room was facing the pool, and it was just above it (3rd floor) noise from the outside would always get in the room all day. As long as there are children playing in the pool, you can hear the noise.

We are on our way home from a weeks stay. The rooms were decorated beautiful. Great views of the city. We were on the 26 floor. The ocean was cool until, you got In and it warmed up. The pools were on the cool side until you were able to get use to it. Sun was hot with the trade wind breeze. Within walking distance to may shopping areas. We did take the bus sometimes for transportation. Service was great everyone was very helpful. Just one call down the desk and they brought up what was needed in minutes.