Did your chauffeur/guide do a fine job?

Your chauffeur/guide, of course, truly appreciates any gratuity you wish to extend to them.  But, more importantly than that, is this.  If you feel that they, the chauffeur/guide, did a fine job with your tour, please mention this fact to your hotel concierge referral person and a friend or acquaintance.  We would truly appreciate that.  Thanks!