This was an early Christmas present from my wife to me. We enjoyed the music of such talented musicians. However, the not so special effect of the "smoke" was very much of a distraction to of what we hope to be an evening to remember. Each time it was used, not only was there a terrible odor, but it was also very irritating to our eyes and throat! My wife was hospitalized in the past due to a repository arrest and spend several days on a ventilator and recovery for weeks. I'm sure, no positive that others with breathing issues had similar concerns. We watched the Christmas Special on PBS this weekend and did not see the use of this hindrance. She booked online and I'm not sure if there was any disclaimer about the special effect. If there is a next time, we consider attending a concert we will be sure to inquire if the distraction will be used. If so, we will not have the opportunity to enjoy the concert in person.