Auto shutoff toilet valves - has anyone used one?

[Matt Fitzgerald]

One of my biggest peeves is a steep water bill.  I hate when toilets run or in one case overflowed and tenants don't tell me about it.  Has anyone ever used an auto shut off valve when a leak is detected? Specifically I'm looking at this one

http://aquaone.com/category/toilet-guardian-products/ Any pros or cons that you've experienced?  Thanks.

[Samantha Klein]

As soon as I close on a property, I install a Niagara 0.8 GPF toilet from Home Depot. They use half the water of standard toilets and have no flapper so they don't leak and run up a water bill. I also do not use regular wax rings, I use the Perfect Seal from Danco and have had absolutely no problems with high water bills, they actually are a little less with the water saving toilets. You can only order the Niagara online.