Any recommendations for a good housecleaner?

We're going to probably be selling our house soon.  We want to have someone come do a major deep-cleaning.  Our house is about 2800 sq ft if that makes any difference.  We used a maid service last time we sold and they did a very very poor job..but I don't remember if it was Molly Maids or Merry Maids (Mom brain...).

Thanks!!