We stayed at the Mago Estate in our life pre-children, about 8 years ago, and in those days we specifically wanted peaceful boutiquey hotels, and this is what we found. We were collected at the airport, and it was quite a ride to get there, but this is the charm of St Lucia. The room we stayed in had incredible views, which I think is the case in most of the rooms. We showered and slept with views looking out onto the Pitons, over Soufriere "town", just high enough to be dreamily removed from it all. In the mornings we were woken to a chorus of dogs barking - so perhaps not ideal if you are a light sleeper, but at this was absolutely minor. The rooms were clean, spotless and comfortable. I would imagine that it would be perfect for a honeymoon. The staff were very helpful and polite, however we had to ask several times for condiments, which somehow could not all be brought at the same time ("salt and pepper and some chill sauce please" resulted in 4 separate trips to bring each item, and realise one had been forgotten). There were massages available in your room, and yoga and t'ai chi available - however given that I have been practicing yoga for 12 years, when I asked the yoga teacher what style he practised, he looked at me like I was from Mars, and bumbled, "a simple style of yoga", so I am guessing he really had little clue himself, besides being lovely all the same.
I'd definitely recommend staying at this hotel. Food was delicious, staff were great but could do with some polish, and the rooms and location were ideal. It was a short walk to the beach, but to be honest, the pool up in the hills looking over the bay was hard to top.
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