This place is HUGE. Huge huge huge.
I understand the comments about it being dated and will echo that; for Vegas (or, rather, for the amount of conventions I know Vegas has), I was a bit surprised. That said, it didn't take away from the event at all.
What I will comment on, and have dinged LVCC for star-wise, is the lack of transportation to/from the airport and the limited access if you're coming via Uber/Lyft/taxi. Our drop-off was a horrendous experience. Pick-up was a little better because there were people guiding you on Paradise Rd., but it was still very disorganized.
PRO TIP: go to a nearby hotel (we went for the Marriott across the street) to get a ride with any of the aforementioned.
Also, AT&T has poor reception inside. Our Lyft driver said Verizon is usually the one to go off a cliff in Vegas, but AT&T was not great within the convention center. If you're on either of those networks, stick with your people or good luck ever reuniting.