I thought Iray should be my next purchase but have seen some negative posts when it comes to animation.:w00t:
Be nice to have a broad picture from as many users as possible on their experience,tips or advice[ And yes I have seen all the tutorials ]

If the replies could include details like  - Length of scene in seconds, number of frames and FPS, output size eg 1280x720 ,any particular Iray settings and TIME TO RENDER  the scene
or any other factors to help us understand whether Iray is a viable 'render option' for animation.
Machine specs are probably relevant too. 

Thanks look forward to some interesting posts.
PS Curve editor might be a better way to spend my money just now!   ;)