We stayed in Pinnacle Resort with our family of four children and all-in-all we enjoyed very much our stay. We had two 2nd floor neighbouring rooms (no joining rooms are in the hotel) with balcony not far from reception and from the restaurant area.
Check-in was quick and though we arrived much earlier than official check-in time we got one of our rooms already to stay there. Rooms are rather functional, nothing fancy. Rooms, hotel, and all public areas are very clean and well kept.
Breakfast is abundant and offers a variety of local thai and standard international foods. Also we had dinners in the restaurant, mostly thai cuisine.
For children there is a separate childrens pool and a small playground. Also we could borrow playtools free.
There is a large garden around the hotel buildings and a beach to the sea. Unfortunately the sea is not immaculate, we have seen floating trash in it, but it is obviously not the fault of the hotel.
If not staying always inside the hotel places, then a car is a necessity to get around.
Guests are mainly Russians, but that seemed to us quite common in the area of Pattaya.