We stayed here two nights in late April 2012 when we visited the Khao Yai national park. We thought the service and gardens were great. The hotel is fairly new, so the gardens have a ways to go to live up to their namesake, but it is clear a lot of effort and loving touch has been put into these gardens and is continuiing. The owners should be commended. It is a small hotel with only 40 rooms, so the service is individual and genuine.
Upon arrival we were upgraded to a Rose room, and it was very nice, with a nice balcony overlooking the gardens and very nice room & bathroom with bathtub. The bed was a bit hard, but I am used to that here in Asia.
The service was very good but that may have been that I was the only foreigner there. The hotel had about 50 people attending a company's motivational seminar, but we were the only tourists to my knowledge. Finding the hotel was a bit of a challenge, but once you are in the area and stay on the larger roads, there are plenty of signs guiding you to the hotel.
The hotel is in the middle of nowhere, so do not expect to wander outside and find another restaurant or shopping or such. This is a great place to relax, but once you are there, that is where you stay.
After having drinks in the English pub, we had dinner there the first night, and the menu had a good selection of both Thai and international fare. It turns out the chef is from Morocco, and it is apparent the owners have invested in the talent and menu planning for a good international restaurant. I ordered the wrapped stuffed pork loin with fried potatoes and a great baked apple with a great filling. All was very good except the pork was undercooked. I returned the dish and the food service manager and chef both came out and apologized profusely -- clearly mortified. They served me a properly cooked version a bit later and took 15% off the bill. Not only that, but later in the evening when they bring your goodnight beverage (ginger tea in our case), the chef and manager were at our door and offered to cook us a special breakfast on our balcony in the morning. We quietly refused as we prefer to partake of the buffet, but it is clear the staff wants to insure your memories of your stay are good.
I would recommend this hotel, but be careful of the restaurant -- I think the food is good, but they are still early in their culinary careers.
The hotel has a facebook page in Thai, but you can view the gardens,etc. there. http://www.facebook.com/pages/Kensington-English-Garden-Resort-Khaoyai/215217131832689
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.