I take exception with this. I have used this plugin on several of my own client's themes, and it integrates perfectly fine. The only exception is that you have to add a small bit of code to the CSS file (as documented in the readme file) for the .replylink class. This is an addition because the standard comments format does not have a "replylink". It does not damage the design *or* integrity of any theme, if you follow the instructions.
I'm glad you found an alternative that you're happy with, but to say that my plugin "damages design and integrity" of a layout is completely false. You haven't told me which theme you're using so I can see if there's some sort of conflict I'm unaware of - but I can say with 100% confidence that my plugin *does not* damage anything. I've used it on too many sites - several with custom comment layouts - and it does nothing more than add that extra link, and an extra div container, which requires a bit of styling - as explained very well in the readme file.