I was just here last week!

One quick tip/trip for people using TSUs:
The Beach Suite is now considered a "standard" suite along with the Lagoon View suite. So a TSU will get you into the beach suite if you'd prefer. Also while I was there I was booked into the Lagoon Suite and wanted to upgrade to the beach suite. At first they offered $50/nt to upgrade, but when I said that the beach suite is a standard suite and that the TSU upgrades to it (I was using a TSU) they upgraded me for free.

Lagoon View Suite vs Beach Suite:
The layouts of the interiors of these are the exact same. The Beach Suite has a better location (in my opinion), but Lagoon View has better/more outdoor space and much better views.

Beach Suite: The location is (obviously) much closer to the beach. A one minute walk to the beach and beach-side pool (along with Olla restaurants). However, on the first floor you have practically no view (they have foliage directly in front of the room, and at least in the room I had, it would have been the golf course just a few feet from our room).

Lagoon View: The views of the lagoon are really neat. We saw schools of fish, tarpon (larger fish) and other wildlife directly from our room. And the balcony area is much larger - it's actual living space. And we had as much natural sunlight as possible which meant that people liked hanging out on the deck with breezes and sun and the view.

Ultimately though, we ended up deciding to move from Lagoon to Beach because we didn't want to be constantly taking the 10 minute golf cart ride back and forth (and calling for and waiting for said golf cart).


Overall summary:
Our family really loved the resort. The people are great, very friendly. After a couple interactions they employees tended to remember names, where you're from, how long you've been there, etc. The breakfast buffet is very good, and the chefs are happy to help make whatever you want even if you don't see it up (for example, my wife was putting together ingredients from buffet for Chilaquiles - the chef went ahead and made a plate for her).
We loved the nature and feeling like it wasn't a big mega-resort, with all the personal interactions.
The kids loved the kids club (Kimbo). It was never very busy, but they usually went a couple times per day and had a great time.
We would definitely return in the future. Honestly, before staying here I didn't really "get" the Andaz brand, but if this is any indication I'll gladly be looking into other Andaz's (particularly looking @ Papagayo now).