I just got back from my test. Job interview type, unsupervised. I opted for the substitution method. I tried to order the Urinator on-line, but they will not ship to Texas. So I bought a product called Number 1, made by Puck Technologies, the same people who make the Whizzinator. It comes with enough for two tests. I was worried b/c it came with heat pads that were obviously Japanese, and did not look the ones on the website. When I tried one out last night, it didn't seem to get very warm. But anything you can feel is above body temp. I used a small space heater to jump start the pad this morning, and it worked well. The device is an elastic belt, with a medical bag of synth urine, and a tube with two clips. When I turned in the sample, it was 98 degrees on the nose. Pros: -Urine is premixed -Clips are totally silent -Ample amount of urine -Excellent thermometer strip Cons: -Belt is small: I'm a 38 waist, and it was very tight. -Velco is used, and if it comes apart, the sound could give you away (I recomend saftey pins) I paid $48.99. Seems it was worth every penny.