Congratulations on your first article. Nice work.

For the future, a few suggestions that might help. Doing a how-to article like this is great. But you also need to include guidance for when and where you can run these tools. For example, you show how to tune a query or a workload, but in neither do you suggest that this could cause considerable load on a production system and maybe shouldn't be run there. You should also address the shortcomings of the tool. Many people who use the DTA find few helpful suggestions.

Just a couple of things to think about for next time. Other than that, great job. Keep it up.