We thoroughly enjoyed our gondola ride at the Venetian.  We opted for the outdoor ride.  We lucked out and walked up, bought our tickets, and were able to board within 15 minutes.  It was a beautiful day, warm with a slight breeze.  Our guide was a friendly older gentleman who chatted us up, same some Sinatra for us, and let us enjoy the company of each other.  Couldn't have asked for anything better at that moment.  Oh and we got a cute picture of us on the gondola (too bad it cost $20+ for the photo).  Hey don't forget to tip your guide.