Well, just got back yesterday and am jet-lagged to hell!
Much to my surprise, I actually really enjoyed it! I was tagging along with friends and it wouldn't normally have been my first choice for a holiday but it was really good. My friends were getting married in the Grand Canyon, which was cool. We got a helicoptor there via Hoover Dam and flew back over Downtown and down the strip.
Other things we did were Cirque du Solei's Ka, which was incredible; fountains at Bellagio; a teeny bit of gambling (mainly roulette); I got to train at Wanderlei Silva's Wand Fight Club which is a world class MMA gym (i got well and truly rinsed); a bit of shopping; and just wandering up and down the strip was great fun.
We stayed in the Stratosphere so got great views of the city. A couple of friends did the rides and the Sky Jump.
I also ate some awesome food - mainly at Wynn and Encore as they cater well for vegans like my girlfriend!
I would probably go again as we didn't get chance to look at everything we wanted to - mainly due to running out of cash!