This is SUCH A GOOD DEAL! For $45 you can eat at any of the 6 buffets in the span for 24 hours (starting from the minute you purchase your pass).
Unfortunately we didn't time this right and only went to 2 buffets.. but it is still worth it!
We at the buffet at Caesar's Palace for lunch, which is a bit small. The main dishes were fine (nothing spectacular, but not bad either), but the desserts were really good! They have delicious oreo kisses that is just AMAZING.
For lunch the next day we ate at the Rio buffet. This buffet is huge! They have a large selection of everything, so I would suggest going here for a filling dinner. Rio is off the strip so you'll need to taxi/drive here, but its worth it!