Well, you don't get into this to have gawdawful lousy sex, sweetie!! Melissa and I have found that the sex we have swinging is awesome, but it is different then the thing we have with each other. I suppose the reason would be that my wife and I have the emotional connection that we would never have with a swinging partner.
But to hope the sex is good but not as good or better then with your partner would be selling yourself short!
Mr. P