Help me please - tell me about the Coliseo

I am trying to find some information about the Coliseo de Puerto Rico as I wish to come to an event there.

I am looking at flying into San Juan, and staying at the Miramar.

Where is the Coliseo, and is it hard to get there?

Is it a big venue? Is it all seated or some standing?

Any information would be great.

Many thanks