I'd like to give it a go, maybe even a few licenses, but not as long as it's (in my opinion) so grossly overpriced. I also take issue with the encryption since as a coder poking around to suit my needs is almost mandatory, the lack of a brand-free option may be a problem too. Is there a setup for uninstalling? i.e. 301ing your old rewritten URLs back to the standard? If not, then removing the SEO software once the effect has taken hold would decimate rankings, so it's a one-way ticket in that sense. If they're thought of that, terrific. :)

It does sound good and it does sound tempting, but there's too many caveats to make it a must-have. Personally.