The software is powerful and does what it says. The developer is one of the most customer-friendly and proactive I have ever had the pleasure to work with.
I had some configuration issues as well as a conflict with another (relatively less well known but essential to me) extension: within HOURS the FUA developer had jumped into my site at my invitation, spotted the problem, released a bugfix version, installed it on my site and tested it.
He then went back to my site at my request and helped me configure the FUA functionality exactly around my needs.
This is great, rare, high-quality software and support. I recommend it most highly. Don't hesitate — if it looks like it will do what you want, get it now.
The developer has just solved a problem arising with a specific third-party template on my site, nothing to do with him at all. The template guys didn't seem interested, but Jimie at SH404SEF took the issue personally and over several days guided me (a non-programmer) until the problem was fixed.
Guys, this is the kind of support that makes the world of Joomla! look great. I think SH404 will work for you first time, and if it doesn't, their support is as good as it gets.