Went back to Serendipity 3 and tried the Peanut Butter Frrrozen Hot Chocolate this time. While it was good and tasted like a Reese's peanut butter cup, I still liked the regular double chocolate one much better.
I was thinking that after a year, maybe things got better here with service. Time wise, it actually got worse! My friends and I were there, got our orders in about 10 mins, finished our food in 20 mins, but didn't actually leave the place till another hour later because our waitress disappeared on us. Time is short when you're visiting Vegas, and we might have spent one hour too much over there.
Sorry Serendipity 3, I have to downgrade you to 2 stars. Step it up next time to get 5 stars!!!