A friend at work said he would sell (we are working on him "giving" me) his copy of Maya 4.5 Beta 2.

How stable is Beta 2? I don't know if it is legal for him to give (or sell) Beta software, but I can't really afford the full price.

Any thoughts? Has anyone worked with Beta 2? Does it include the Fluid Effects? Will it work with MentalRay?