the 2.5 version is being written right now should be available very soon
may be next month at 100 %
but i still have to test that one
but in yafaray usuaslly you have to re do the mat as per yafaray way of dealing with mat
but with 2.5 version might be easier and more complete then the old version
but yafaray offer seveal ways to render and greater quality then in blender
so depends on the quality you need for your render
but it does not cost much so try it
you need to practice with it so need to rad the different applications notes available
and should not be difficult to learn but require some hours of testing
have fun
happy 2.5