I booked a night at the Holiday Inn Abu Dhabi just because it was near the airport, but it really impressed me. My room was a good size and just as nicely styled as many 5-star hotels. The king size bed was comfortable and and the bathroom was very clean. There was an extra charge for WiFi but I thought it was reasonable.
My favorite part of the Holiday Inn was definitely the rooftop swimming pool. You have a great view of the desert surrounding the hotel and the water is so refreshing in the heat.
In terms of value, I think this is one of the best hotels in Abu Dhabi and I'll definitely be back.