This isn't an attempt to get affiliate sales (I signed-up for their affiliate program, but I'm not promoting it here). I bought XsitePro2 last week, after a drawn-out comparison to SBI!. It's marketed as a Frontpage/Dreamweaver alternative for internet marketers.
In my opionion, it's just a great piece of software -- I would use it even if I just was into website development and not necessarily marketing.
I still believe that SBI! is a viable alternative, and I actually intend to get it (through Steve's link, of course

) in a number of months -- I think it will enhance my internet marketing education, at the very least.
However, I'm really happy about my purchase of XsitePro2, and it's something that I don't see discussed here. It's really simple to learn -- I skipped most of the instructional materials, against the strict warnings of the developer
Here's what tipped the decision in favor of XsitePro2: I already had a webhost and domain name that I'd purchased. At $197, it's no more economical than SBI! if you don't already have a webhost.
Many of Steve's readers who don't have much of a background would probably benefit from SBI! over XsitePro2. HOWEVER, many people in the forums -- who tend to be more tech-savvy -- might be better off w/XsitePro2 (you can still benefit from the free SBI! materials).
If Dreamweaver/Wordpress/Frontpage/etc., are already working for you, you prob don't need it. But IMO, XsitePro2 is legit if you want a way to quickly and easily publish on the web. The tools are so awesome -- I love how quickly I can make modifications and publish. That said, I'm not sure how easy it is to do with those other programs.
The only downside that I hear it's hard to work with the html once you export into other web development programs, so you have to stick with it. Also, I have to do website development on strictly one or two computers (they give you permission to install on 2) -- so I can't tweak pages at work, for example.
If a friend asked about XsitePro2 vs. SBI!, I'd say, "If you're comfortable purchasing webspace and a domain name on your own and assigning it to your site, get XSitePro2. If not, go w/SBI!."