I view it as dangerous because it spits out a definitive answer without clear explanation of the model used to generate the estimate. If you look at other cost estimation tools (even closed source tools) will explain the model and assumptions used to generate the estimate. You can then make the determination if the model and assumptions apply to you.
It also doesn't indicate the kind of application (which is probably a largely stand-alone application). You can't stop some clients from going on to these sites and looking up a cost and not understanding what goes into an estimate. What would be even worse, in my mind, is to have other developers use a tool like this to generate a cost and then fail because they grossly underestimate complexity.
It also doesn't indicate the kind of application (which is probably a largely stand-alone application). You can't stop some clients from going on to these sites and looking up a cost and not understanding what goes into an estimate. What would be even worse, in my mind, is to have other developers use a tool like this to generate a cost and then fail because they grossly underestimate complexity.