I love Las Vegas. It is fascinating, interesting and exciting.
Las Vegas can be very expensive on one hand but also quite a deal on the other. There is a lot of free and low cost things to see and do.
Hotels are a steal or deal, however you want to look at it. I recommend staying on the strip although you can get a hotel at much lower cost off strip.
Las Vegas will be crowded and frantic. Depending on the month, it can be very hot. Do your homework before going.
I am attaching a link to an article that I wrote after my second visit to Las Vegas. it should prove helpful to the first timer.