Historic Hilton hotel is worth the expense
I stayed at the Hilton for a week to attend a conference at the Fort Worth Convention Center. The Hilton was convenient to the Center (1 block away) and cheaper than the official conference hotel (Omni) by almost $20 per night. In addition, the Hilton had free wifi Internet (FINALLY a hotel listens to what business customers want!).
The hotel is in great shape and the rooms are very nice. I saw several rooms, and while mine was the smallest, it was more than adequate for a single or double occupant (2 double beds). 
The fitness center was the absolute best that I have ever encountered during my travels over the past 20 years and I was able to do my full 1.5 hour workout each time I was there thanks to the multiple treadmill/elliptical machines, full set of free weights, Pilates/yoga equipment, and multiple weight machines. All were recent models and worked well. Free towels, headsets, television, and water were also major bonuses. 
The small restaurant was adequate for lunch (salad) and not overly priced. There is a Ruth Chris steakhouse attached, though my current diet doesn't permit me to visit. Colleagues who ate there raved about it.
The concierge and check-in staff were excellent as well. Only two items kept me from giving this hotel an excellent review. The soda machines (Coke products) charged an outrageous $3 per bottle, twice what one expects to pay, AND took only cards, not cash. The second was the fact that the housekeeping staff was very loud, yelling at one another the length of the hallways the only morning (before 8am!) when I was able to sleep in and catch up on business via the computer. There was no safe or mini-fridge in the room, but I heard that those were being added this year.