I have used the RhinoMocks product for quite some time and have been quite happy with the product - never had a reason to look elsewhere really. I was recently asked by the good folks at TypeMock to give their product a whirl and was wondering what other developers opinions are about Typemock Isolator. Are there any other isolation/mocking frameworks that you would suggest and why?
Moq is what I have been using recently. It is well worth a look; I especially like the lambda syntax. I achieve a great deal in a very terse yet readable manner.