I LOOOOVE Consol Energy Center. I was here for a Katy Perry concert and a Maroon 5 concert; I had a blast at both of them. I've been in the pit, and sat in the 100s. I can't wait to go back for my next concert. The bathrooms were clean, and there was never a long line in the bathroom.
I've never had a problem finding parking. There is a parking lot across from the venue that costs $20 to park, and a parking deck on the other side that also costs $20 to park, I believe.