I recently stayed at the Hilton Waikoloa Village hotel (Jan 29 - Feb 6, 2012) and there are some of the issues that need to be addressed in my opinion at the Hilton Waikoloa on the Big Island in Hawaii:

Parking
We stayed at the Ocean Towers, which is a very long way from the parking lot. It's at least a 15 minute walk at a very brisk pace. The trolley was NOT acceptable (see next). We could not drop items off at our room or take a quick break in our room because of the distance from the parking lot. And they charge for parking. Valet would not have helped. Unfortunately, we were late to a couple of activities and always felt rushed when trying to get to our room. This made our hotel-experience very stressful and uncomfortable. We therefore stayed away from the property. And they make you pay for parking that's so far away. Terrible.
Suggestion: ask for a room close to the lobby

Trolley
The trolley system is terrible. It is very slow. Did I say slow, I meant old-man slow! We heard from other guests that have stayed with you previously that the "new" trolley is 4 to 5 times slower than the old one. Many times we left our room and we were able to catch or pass the trolley while walking. Additionally, the trolley did not come often enough. Many times, the wait time was 15+ minutes. This is really bad when you have a 15 minute quick, pace walk or wait 15 minutes for another 15 minute trolley ride. 30 minutes to get to my room from the lobby of your hotel is unacceptable.
Suggestion: figure out how to not use the trolly or boat or have to walk 15+ minutes (room close to lobby)

Welcome message and Upsells
On our first morning, we received a call at 6:30am "welcoming" us to the property and reminding us about our "free" gift.
On one of our last evenings, we received a call at 10:30pm. It was a voice mail from the managers about offer to stay again, but it still rang in the room. Very distributing when trying to sleep and then seeing the flashing red light on the phone. Not a pleasant night's sleep.
Suggestion: Ask front desk to NOT call before 10am or after 8pm

The property is expansive and provides an interesting sight to behold around every corner. The pools are terrific and watching the humpback whales about 1/2 mile off shore is amazing.

Although there are over 1,000 rooms many times, especially in the evenings, you can feel like you are one of a few dozen people there - really. The only places this is not true is at the buffet breakfast, which really looks more like a cafeteria and has a ton of people and servers that are always disappearing.

As adults, we were as intrigued as the kids, maybe more! The water slide is great.

One thing that left a bad taste in my mouth - one day we happened to be in the room at the same time as the cleaning lady and she was simply rinsing off the dirty coffee mugs in the bathroom sink and then returning them to the coffee machine area with the "clean" covers over top. That just doesn't seem right!

We stayed at this Hilton for 2 nights in January. It was bigger and better than we expected and we expected it to be brilliant! We booked througt the hotel's own website where there are a wide variety of room types. We chose a King Sea view with lanai (balcony) and breakfast. There was valet parking when we arrived. Made sure to have a few "bucks" on you to tip the drivers. We waited for the boat outside to take us to our room! Boats run about every 15-20 minutes after 2pm, otherwise it is easy to walk or catch the tram. Our room was overlooking the golfcourse with the sea in the distance but was big and clean. Breakfast was well worth having, the buffet was tasty with an omlette bar. There was hot breakfast and continental things too. The breakfast room overlooks the whole lagoon and waterfall! A sea turtle swam by us in the lagoon and we went to watch the dolfins while eating lunch. There are so many swimming pools and waterslides all over the site. You could spend all day exploring! Hammocks and sun loungers were first come fisrt served. All the staff were very helpful and friendly! We ate the Chinese restaurant which was expensive but very good food. Be sure to visit Kailua-Kona, beautiful seaside town, south of the airport.

beautiful resort, restaurants very good , it's a big resort but quiet