I have not used one but Ive seen them in use at my local feed store. I do like the all metal construction and the wire floor. Quail poop a lot. The only issue I see is the wire floor is 1/2" mesh. This is way too big for newly hatched quail, so you'll have to put down paper towels or something until they're around a week old. Which seems like a pretty big downfall considering, in my climate anyway, I can move my chicks outside as early as 10-12 days. 1/4" wire floor would be ideal. PVC coated would be even better.
How many chick's do you plan on hatching at once and do you plan on continually hatching on a regular basis?