As an expert with many years experience using models for decision making this is one that I have found very easy to learn even though it does require some time before you "get" all its capabilities but once there nothing will stop me going forward! There isn't anything really i do not like as far as functionality goes - just keep learning more features until they work well enough so your needs dictate which ones come next! If we had been able to incorporate into our system earlier then maybe things would be different now however at least what has happened was due to external factors beyond my control (and therefore cannot blame).