but I don't understand why people don't just use synthetic urine if they aren't going to be watched.

The Go Number One is good for 2 uses (approximately). You wear it as a belt so it heats up to your body temperature. If that is not good enough then it also comes with one of those disposable hand warmers for you to put on the pouch.

It has a thermometer strip on it also so you know approximately the temperature.

All in all for $50 I'd say it's a good deal. I keep a spare one in my laptop bag (for when I'm at work). Always good to be prepared.

:thumbsup:

edit: forgot to mention I've also used this for urine that's been sent out to the lab, not just the strip tests.