In these economic times, price is an important factor. However, I think service is still what separates a good review from a bad one. Master Cleaners was there for me when I needed them.
I flew into Las Vegas a day before my trade show and needed to get my clothes cleaned as I came in from another trade show. I spoke with the owner and even though I was 2 hours past his same day cut off (9am), he accepted my clothes and had them cleaned and pressed for me by 4pm the same day. Now that's service!
I highly recommend this place if you ever need same day service. They are just off of Jones and Sahara. A quick 10 min drive from the strip.