Overall, I had a very comfortable stay, and loved room service - the breakfast was awesome, better than Egg Slut! (HIGHLY recommend those fluffy pancakes). Would definitely return!
I like how the towers are not too far away from each other (unlike at the Venetian-Palazzo) - key if you are staying with other friends in the hotel. Also liked that parking is readily accessible from both towers and reception, and the vibe is more modern. The selection of restaurants in the hotel was $$ - my favorite was Momofuku Milk bar for the corn cookie, Wicked Spoon, and the Chandlier bar.
However, the upgraded suites are not that impressive as they are still not as large as a regular sized room at the Venetian, and comes with a small, oddly shaped and uncomfortable tub. If you choose to be upgraded those rooms only come with a single King sized bed (no double queens).