A lot like HK (not surprisingly) except with a more European feel to it. We were only there for a day so we didn't get to see everything (although I don't think you really need much more than a day anyway)!
We saw the ruins of the Church of St Pauls, visited the A-Ma temple and went up the Macau Tower (where we definitely DIDN'T do the SkyWalk, Mast Climb or Sky Jump)!!
Sadly we didn't have time to visit one of the many casinos on Macau (which was probably for the best)! Here's a boring piece of info - did you know that Macau's casino's generate more money than those in Las Vagas??? No, neither did I!