Your massage experience is as good as your masseuse, although the center has some responsibility to ensure consistency. Have you ever gone to a massage center where they were playing Snoop Dog? While I like Snoop Dog, my wife was expecting serenity, peacefulness, relaxation, etc.
We were visiting Vegas with our four kids, so I figured I'd give the wife a treat in the middle of our visit to allow her to rejuvenate via a $45 Groupon for 60 minutes of massage. Her masseuse was very aggressive had a persistent attitude about her style of massage that my wife ended up hurt more than she was relaxed. You could say she was injured and her body ached for the rest of the trip. I can't give them more than two stars.
I'm not hating on them. I guess my recommendation is that if you really want to try them, read the reviews and ask for specific masseuses' that have been mentioned. I was wrong to assume that they are consistent across the board. Good luck.