Considering the price of the product and the competion on the haze market, the Stairville DMX hazer does a good job.
In small to medium rooms, the haze can be quite difficult to maintain at a steady level. Larger rooms however, is easily covered in haze as the product can produce a heavy stream of haze, approacing smoke levels.
I can recommend the hazer for everybody, even the professionel, since the price is low and should the unit malfunction, it doesn't cost a fortune to replace it.