I liked the ability to see the results of promotions in real time and with the ability to drill down to the product level. I also liked the ability to see which customers were in the test and which ones were not. There was a lot of manual work to do and the tool was not very intuitive. I would recommend that the tool is as easy to use as possible. It would be great to be able to test promotions and see results in real time. I would also like to be able to see which customers were in the test and which ones were not. This would help us to identify the best customers and target them with future promotions.