Hi John.

>Are there any issues with stability ?

Just to give my experience with it. First, I use VFP7 SP1, so Luc might have better information to you regarding VFP6.

I've been using the product for some months. It's been helping a lot. It exports FRX with great accuracy. It might be slow for large reports, but this seems to be due to the products you're exporting the report to. The results are really WYSIWYG.
There's now a Previewer of its own, fast enough and with a toolbar and report preview form that you can customize.
Other point I appreciate is the fact that they keep working and releasing new features constantly.

I haven't had problems with stability. I even customized the class to show my CodeMine progress bar.

Best.