In my view, e-Sword is a highly useful tool for the study of the Biblical texts; I would currently rate it as the best free Bible software available for Windows OS. From the perspective of the teacher of Biblical Studies, the ease of installation and use, coupled with the programme's ability to show up to four Bible versions in parallel display, makes it a very useful tool for exegesis - that is why I try to introduce all my new entry-level students to it. After all, there are a number of inexpensive commercial programmes which are not as useful as e-Sword, so one must congratulate the author of the programme on his efforts.
I agree that e-sword is the "best free Bible software" and highly recommend it especially for its user-friendly appeal.
For those interested in many Reformed resources for e-Sword, check out my website. I am currently trying to complete all of John Piper's sermons by topic.