We hiked Cholla trail today and found it more challenging than expected, but also found the views at the top more rewarding than expected. The whole hike took us about 2.5 hours. There are some real sketchy, steep rocks as you approach the very top. But, no pain no gain. If you stick with it and push yourself, getting to the top is really awesome.
I would highly suggest bringing a Camelbak of water (my 23 oz waterbottle had to be rationed til I got to the top), shoes with good traction, and sunscreen and/or a hat.
Parking is tough -- street parking is available but it fills up really quickly, especially on the weekends.
One of the best parts of living in AZ is the awesome hiking, so go out and smash the Cholla trail!